RFID NFC and Mifare programming - Java (Windows) source ...

A source code example of the application for Mifare card encoding done in Java (Windows) - uFRCoderAdvanced . Advanced application has functions for card sector and block address reading and writing, block value entering and block data value incrementing and decrementing. This software also contains the function for defining the Mifare card keys and key index. Source code of the software is made for use with uFR reader/writer made by D-Logic

This application example is meant to provide the base for further...

Read more


Website: youtube.com

Related topics : free rfid reader writer software / rfid card reader software free / rfid reader access control system / rfid reader software free / rfid card reader writer software

RFID Connect: UHF 433MHz Compact Rugged Active RFID Reader ...

UHF 433MHz Compact Rugged Active RFID Reader

Product Overview

 

GAO RFID's UHF 433MHz compact rugged active RFID Reader offers a perfect access solution and provides instant report of all detected Wavetrend active RFID tags.  It responds automatically without the need for a PC or software applications once tag IDs and I/O positions are uploaded, and can be upgraded to increase the standard...

Read more


Website: http://www.rfidconnect.com

RFID NFC and Mifare programming - Visual C# (Windows) source code examples Advanced for uFRCoder

A source code example of the application for Mifare card encoding done in Visual C# (Windows) - uFRCoderAdvanced . Advanced application has functions for card sector and block address reading and writing, block value entering and block data value incrementing and decrementing. This software also contains the function for defining the Mifare card keys and key index. Source code of the software is made for use with uFR reader/writer made by D-Logic

This application example is meant to provide the base for further...

Read more


Website: youtube.com

Related topics : free rfid reader writer software / rfid card reader software free / rfid based projects with source code / rfid reader access control system / rfid reader software free

RFID Buying Guide - BarcodesInc

Choosing the Right RFID Technology

Share:

RFID has been a big buzz word lately for anyone who is interested in any type of item identification. Up until now, the trusty barcode has been the identification tactic of choice, and has served many businesses for decades. However, RFID continues to grow as a possible alternative. While RFID may not be a suitable replacement for barcodes in all...

Read more


Website: https://www.barcodesinc.com

Related topics : passive rfid tag read range / active rfid tag read range / uhf passive rfid tag reader / rfid active reader passive tag / rfid tag read range

Frequently Asked RFID Blocking Questions & Answers | SkimGuard

Q. Is it true that the information that can be electronically 'skimmed' from a contactless credit card or debit card never includes the cardholder's name?

Sometimes the name is transmitted, but generally not. It matters little however, as the transaction is accepted or declined based on the account number and the expiration date of the card. After that it's up to the merchant but rarely is a...

Read more


Website: skimguard.co.uk

Related topics : credit card wallet with rfid protection / rfid credit card blocking theft protection sleeves / rfid protection credit card sleeve / rfid credit card blocking theft protection / rfid credit card theft protection

Frequently Asked RFID Blocking Questions & Answers - SkimGuard

Learn more about this new type of digital theft.

 

To read more about a particular item simply click on the title to expand it.

Q. Is it true that the information that can be electronically 'skimmed' from a contactless credit card or debit card never includes the cardholder's name?

Sometimes the name is transmitted, but generally not. It matters little however, as the transaction is accepted or...

Read more


Website: skimguard.co.uk

AS RFID Solutions (P) Ltd.

RFID READER

Laptop Tracking

AS RFID Solutions Monitoring and tracking movement of a Laptop. Tracking and Identifying Owners and Users of Laptop with photos. Identifies the deviations from expected location or condition. Trigger/exception based alerts or specific warning...

Read more


Website: http://asrfidsolutions.com

How Much Does a Card Access Control System Cost?

Home > B2B > Access Control > Card Access Control System Cost

How Much Does a Card Access Control System Cost?

Get Free Access Control Price Quotes

Compare Card Access Control Prices

Workplace security is of the utmost importance. You don't want just anyone roaming the halls or gaining access to restricted areas. It is crucial to protect your company's sensitive information, ensuring that...

Read more


Website: http://www.costowl.com

Related topics : rfid proximity door lock access control system / rfid door lock access control system / door access control system using rfid / door access control systems rfid / rfid based security and access control system

Medical Grade Tablet PC | CyberMed T10C Medical Tablet

Why Medical Tablet?

Medical Grade Tablet PC

Powerful Windows tablet designed for near-patient and hospital use. Waterproof front bezel and hygienic aluminum housing withstands routine liquid disinfection as recommended by CDC. One of the only EN60601-1 certified tablets running on battery power or plugged into the wall.

Powerful and Portable

At 2lbs, The CyberMed T10C medical tablet offers...

Read more


Website: https://www.cybernetman.com

Related topics : rfid based smart card reader / rfid smart card reader / rfid proximity card reader / usb rfid card reader software / rfid card reader usb

RFID tag | The IT Law Wiki | Fandom powered by Wikia

Form factor .

Tags can be attached to items using an adhesive or can be embedded within the item. The primary concern when a tag is attached to an item is how easily it might be detached, whether accidentally or maliciously. Tags attached to items also are more vulnerable to harsh environmental conditions such as dust, debris, humidity, precipitation, and extreme temperatures. However, the...

Read more

Date: 2013-12-13 16:36:05
Website: http://itlaw.wikia.com

Related topics : passive rfid tag and reader / rfid passive tag reader cost / rfid tag and reader communication / passive rfid tag reader price / rfid active reader passive tag

RFID in Libraries: Privacy and Confidentiality Guidelines ...

Radio Frequency Identification (RFID) technology collects, uses, stores, and broadcasts data. Components of RFID systems include tags, tag readers, computer hardware (such as servers and security gates) and RFID-specific software (such as RFID system administration programs, inventory software, etc.).

RFID technology can enable efficient and ergonomic inventory, security, and circulation...

Read more

Date: 2017-12-10 01:59:13
Website: http://www.ala.org

RFID student attendance | SMS alert for school, child safety

RFID and SMS based automatic student attendance system

Indian schools are all set to implement a high-tech solution that will enable the school and parents to monitor and track students entry and exit from school, called RFID and SMS based student attendance system. This monitoring system already been adopted by many renowned schools all over in India and the process of adoption is...

Read more


Website: http://www.pulse17.com

Card Encoding Engine ID and Smart Card Personalization ...

Card Encoding Engine is part of a larger smart card solution, the idblox[TM] Identity Credential Ecosystem. The idblox ecosystem enables true interoperability among card infrastructure components with the ability to create high-security, multi-functional smart card projects without depending on programmers, system developers, or even graphic designers to get the job done. With idblox, card...

Read more


Website: http://www.cardlogix.com

Related topics : rfid based smart card security system / rfid based smart card security system project / rfid and contactless smart card applications pdf / rfid and contactless smart card applications / rfid based smart card reader

pcProx USB RFID Reader - Trossen Robotics

Reviews (0)

pcProx®-USB: No Programming Required!

The pcProx USB RFID reader is compatible with all EM4102 (125 kHz) RFID tags.  This reader acts as a hassle-free keyboard wedge.  The powerful yet intuitive configuration software can be used to configure the reader's output with various formatting options. Once configured, pcProx takes the proximity card's identification information and sends it as keystrokes as if it were typed by the user.

When pcProx is deployed, no software is needed.  It uses standard USB drivers supplied by the operating system such as Windows or Macintosh. ...

Read more


Website: http://www.trossenrobotics.com

Related topics : pcprox usb rfid reader / 125 khz rfid tag reader / usb rfid card reader software download / usb rfid card reader software / rfid tag reader usb

GDS3705 | Grandstream Networks

The GDS3705 was built for users looking for a strong audio-only facility access and security monitoring solution that can be deployed in environments of all sizes. This audio door system features dual microphones and HD loudspeaker with advanced AEC to offer intercom functionality, can support SIP calls to IP phones and has a built-in RFID chip reader and keypad for secured keyless or key entry. The GDS3705 comes equipped with a zinc alloy metal casing, making it weatherproof and vandal...

Read more


Website: http://www.grandstream.com

Related topics : rfid card reader software free / rfid chip card reader / rfid management software / rfid mobile phone reader / rfid chip reader app

RFID: The New Technology - Tech Featured

Tweet on Twitter

Origin of RFID tags

Leon Theremin is thought to be the first user or inventor of this device as the inevitable part of spy-kit for the Russian Government in 1945. This cannot be a reliable story: the tool invented by Theremin was a passive covert listening device and not an identification tag. The technology applied in RFID has actually been since the early 1920s. The IFF...

Read more


Website: https://techfeatured.com

PIMPEX AutoID Broker - PIMPEX is worldwide POS, Barcode ...

AutoID Brokerage - POS, barcode scanner & printer, mobile terminals, handhelds - save 40% or even more with our used units and gain your essential competitive advantage now! We sell also brand NEW units!

PIMPEX is a worldwide broker for DC & POS Hardware since 2004 - you can sell or buy your used hardware over us. As we understand our role as an independent hardware broker, you will receive...

Read more


Website: http://pimpex.com

Related topics : rfid label printers / rfid label printer price / rfid tag reader long range / rfid label printer / rfid tag reader system

The Application Of RFID Technology In Library | STARNFC

The RFID intelligent library management system is composed of RFID smart tag (RFID TAG), intelligent detection antenna, administrator reader, automatic lending desk, handheld reader and application software.

1smart tags can provide convenient data management, and has anti-theft protection function; intelligent detection antenna mainly provides the entrance security work, it can accurately...

Read more


Website: starnfc.com

Library Automation Using RFID ~ Computer Science and ...

In the ensuing discussions we will see how RFID technology is recommended for library automation. RFID technology is not just there to tags books and other library assets; it will provide a comprehensive route for enhancing all library services and upgrade operations for everyone concerned with the library.

Issues: During a day, library managers have to supervise many activities within their...

Read more

Date: 2017-02-01 17:35:39
Website: http://necsea.blogspot.com

Related topics : library shelf management system using rfid technology / rfid tag library management system / smart library management system using rfid / rfid library system technology / rfid library management system video

13.56MHz PA for RFID reader reference design.

I found an application note from MicroChip about a 13.56MHz RFID reader reference design. I attached the schematic here. I have some questions:...

For the power amplifier, how to design the matching network? how to decide the component value?

In this PA design, the value of RF chock L1 is not large (0.47 uH), actually it has the same value as L2. Why? Also, C9, C10 and C31 are connected in...

Read more


Website: edaboard.com

Related topics : rfid reader reference design / rfid reader design schematic / antenna circuit design for rfid applications microchip / rfid hf reader antenna design / rfid reader antenna design

Building An Active RFID People / Asset Tracking System ...

Building An Active RFID People / Asset Tracking System With Mesh Networking

Introduction

I was initially looking into off the shelf hardware, however was unable to find any readily available equipment (to the hobbyist market in low quantities) that was reasonably priced, and fit the requirements. Therefore partly as a personal project, and partly in preparation for a possible commercial product...

Read more


Website: http://www.ns-tech.co.uk

Related topics : rfid tag reader software / active rfid based asset tracking system / rfid tag reader long range / rfid tag reader system / asset tracking system using rfid

Best Rfid Clone to Buy | Buy New Rfid Clone - DHgate.com

Best Rfid Clone to Buy

23 items found for Best rfid clone

Free Shipping

In Stock

Short Description: Dimensions: 98 mm (L) x 65 mm (W) x 12. 8 mm (H) Interface: USB Full Speed

US $ 35.07 - 38.25 / Set

Report Item

5

Short Description: High frequency antenna built- in, antenna depth...

Read more


Website: dhgate.com

TrackSeal Software Supports RFID Readers Supplier

Zebra MC9190Z

LONG RANGE, HIGH PERFORMANCE SAVES TIME AND MONEY

To put more product into the hands of your customers - and put more profit into your pockets - you need to know wha you have and where to find it. On the dock or in the storeroom, the MC9190-Z Handheld RFID Reader is designed to make that job faster and easier.

The MC9190-Z is Zebra's new best-in-class standard for handheld RFID...

Read more


Website: http://www.trackseal.com

HF RFID Reader USB Module - deciphe it

RSS

Technical Description of the USB HF Reader Module

The URM (Universal HF Reader Module) is an ISO 14444A and ISO 14443B compatible proximity RFID read/write device operating at 13.56 MHz.

The HF RFID Reader is able to inspect, test, and personalize all compatible transponders as they are e.g. used in the public transport or e-Government sector and moreover it is fully compatible with the...

Read more


Website: deciphe-it.com

Related topics : hf rfid reader module / hf rfid reader usb / rfid hf reader antenna design / hf rfid reader antenna / small rfid reader module

RFID(Radio Frequency Identification) Based File Tracking ...

RFID (Radio Frequency Identification) based File Tracking System(FTS) is ideal solution to track the important documents within the offices.The File Tracking System(FTS) enables users to automate management of physical record data and improve the productivity without any inventory errors.A wide range of enterprises rely on files and folders, and records that must be accurately tracked [...]

Tags:...

Read more


Website: biometricsintegrated.com

RFID Reference Design offers true 64-bit encryption engine.

RFID Reference Design offers true 64-bit encryption engine.

Press Release Summary:

Oct 21, 2008 - To facilitate development of secure, 13.56 MHz logic-based, passive RFID, close proximity applications, AT88SC-ADK2 Keen+ development kit includes Crypto Evaluation Studio tool suite, which has menu-driven GUI for CryptoRF configuration and testing as well as development libraries and code examples...

Read more


Website: https://news.thomasnet.com

Fingerprint based Attendance Machines Suppliers in India

Ambala Cantt 133001, Haryana India +91 999 663 5607, info@navkarsys.com

Biometric Fingerprint Attendance Systems

Biometric Fingerprint Attendance Systems

Navkar Systems is well known for Providers of Quality of Biometric Time Attendance Systems in all over India. Thumb based Attendance Machine are best machines to solve all your problems related to time and attendance of the employee....

Read more


Website: http://biometricattendanceindia.com

Related topics : rfid card attendance system / rfid attendance system price / rfid reader attendance system / rfid time card system / rfid timing system price

RFID and Keypad Based Access Control System using Arduino

RFID and Keypad Based Access Control System using Arduino

In the previous post, we made an RFID based access control and alert system using Arduino in which system sends us messages when the access was granted or denied. We was also be able to open the door lock and halt the system by sending the message to Arduino. There was a master tag that was used to add/remove other tags.

In this post, we...

Read more


Website: https://electronicshobbyists.com

How to setup a Raspberry Pi RFID RC522 Chip - Pi My Life Up

Ethernet Network Connection or  Wifi dongle (The Pi 3 has WiFi inbuilt)

Assembling the RFID RC522

One thing you will notice when purchasing an RFID RC522 Reader is that 90% of them don't come with the header pins already soldered in. This means you will have to do it yourself, luckily soldering header pins is a rather simple task, even for beginners.

1. First off if the header pins you received...

Read more


Website: https://pimylifeup.com

RFID Circuits free electronic circuit links

Wireless RFID Smart Key Detector

Many cars now use a key with an imbedded RFID microchip.� The microchip is read when the key is inserted into the car's ignition.� The keys containing a microchip often look the same as most other keys. People duplicating car keys will often not know of the microchip.� This circuit will light a LED if it...

Read more

Date: 2017-12-07 20:55:33
Website: http://www.discovercircuits.com

RFID Vehicle Tracking India, RFID Vehicle Tracking ...

RFID Vehicle Tracking

The Best RFID vehicle Tracking Solutions Now at Your Disposal

With both commercial and private vehicle growing on a regular basis and at a very rapid pace, the procedure of vehicle identification has transformed into a very complicated one. This goes special for situations that require recording and identifying the movement of a vehicle in and out of a premise. However,...

Read more


Website: etsrfid.com

RFID Hotel Card Door Lock Nigeria | Hiphen Solutions Ltd

Software support most popular Microsoft OS including Win2000/2003/XP/Vista

No need use to use a popular or top configuration computer.

All cards programmed could be erased and cycle used.

Easy use-

Easy read icons and letters show room status by large block.

Mouse and keyboard for all operation.

In traditional lock, you could not know 'When and who entered which room' or you can know it just...

Read more


Website: hiphensolutions.com

RFID in Healthcare – Creating smarter hospitals. Enhancing ...

Leave a comment Healthcare By admin

How many times have you heard or read about a surgical procedure that has gone wrong? How many times have you read of incorrect medicine (unintentionally) being administered to the patient? I am sure each person reading this blog would have read about such an incident at least once.

While we sympathize with such cases, it is a matter of lives and adoption of...

Read more


Website: https://www.dolphinrfid.com

GitHub - miguelbalboa/rfid: Arduino RFID Library for MFRC522

The SDA pin might be labeled SS on some/older MFRC522 boards.

Hardware

There are three hardware components involved:

Micro Controller:

An Arduino or compatible executing the Sketch using this library.

Prices vary from USD 7 for clones, to USD 75 for "starter kits" (which might be a good choice if this is your first exposure to Arduino; check if such kit already includes the Arduino, Reader, and...

Read more


Website: https://github.com

Related topics : rfid tag reader arduino / rfid proximity card reader kit / rfid tag and reader working / rfid tag and reader circuit / rfid tag reader circuit

125KHz EM4100 RFID Card Read Module RDM630 UART Compatible ...

125KHz EM4100 RFID Card Read Module RDM630 UART Compatible Arduino

Description:

The dedicated module RDM630 series of non-contact RF ID card, preclude the use of advanced RF receiver circuits and embedded microcontroller design

Combined with efficient decoding algorithms, to complete the EM4100 compatible ID card data reception

This module is convenient to use, the power supply serial connection...

Read more


Website: banggood.com

Related topics : 125khz rfid module rdm630 arduino / 125khz rfid module - uart arduino / 125khz rfid module - uart / rfid credit card reading software / serial rfid card reader 125khz

Flexible UHF Gen 2 Mount-On-Metal RFID Tag

GAO RFID Inc. is offering its flexible UHF Gen 2 mount-on-metal RFID tag which is ideal for both indoor conditions and for basic outdoor use. It is appropriate for multiple applications such as asset tracking and supply chain applications and is especially useful for tagging cylindrical metal objects.

The on metal Gen 2 RFID tag, model 116046, operates over the frequency range of 902 to 928 MHz...

Read more


Website: supplychainmarket.com

RFID WiFi Reader | Details | Hackaday.io

There are very cheap RfID readers around for a while and bringing them together with our great hero esp8266 WiFi chip seems to me a good idea. You of course can find other palaces to use this device. You can easily record the data in a database. The id and the time-stamp of reading the key-fob or RfID card can be used as workman attendance control system for your factory. I will try to code some...

Read more


Website: https://hackaday.io

Related topics : rfid card reader wifi / rfid card reader serial arduino / rfid card reader serial / cheap rfid reader chip / cheap rfid reader

NFC and RFID - CoreRFID

The NFC Near Field Communication standard focuses on three activities. Firstly it allows a reader device to interact with a passive radio frequency device, typically a contactless smart card. Secondly the reader device incorporates its own contactless smart card which it can use as part of the transaction. Thirdly it allows two reading devices to exchange data.

Examples of NFC and RFID style...

Read more


Website: http://www.corerfid.com

RFID integration in the video image of the video ...

RFID Integration

RFID Integration

The registration of a filled supermarket trolley directly at the checkout via RFID transponders, without customers having to place all items on the conveyor belt, is, at the moment, still a long way off. The idea of integrating RFID data into video images however has now become a reality for the first time. This application has been made possible through the ...

Read more


Website: https://www.dallmeier.com

Related topics : radio frequency identification tags (rfid) / rfid radio frequency identification tags / radio frequency identification device rfid technology / radio frequency identification technology (rfid) / radio frequency identification technology rfid

RFID definition - openpr.com

RFID definition

RFID (© Fotoidee / Fotolia.com)

RFID basically means your wallet will block 'Radio Frequency IDentification', which is a means through which technologies can communicate with one another when at close proximity. RFID has a number of powerful benefits both practically and for marketers. This is how the chip in your credit card allows for contactless payments and it's a great...

Read more


Website: https://www.openpr.com

Hacking Mifare Transport Cards - Schneier on Security

Hacking Mifare Transport Cards

London's Oyster card has been cracked , and the final details will become public in October. NXP Semiconductors, the Philips spin-off that makes the system, lost a court battle to prevent the researchers from publishing. People might be able to use this information to ride for free, but the sky won't be falling. And the publication of this serious vulnerability...

Read more

Date: 2017-03-08 08:08:46
Website: https://www.schneier.com

Related topics : hack chip mifare classic rfid / mifare classic rfid chip / mifare classic rfid cards / radio frequency identification card reader / rfid mifare classic hack

Products | Bar Code India Ltd

RFID Smart Labels / Inlays

Software

At BCIL, we offer the best in class software products from its own portfolio and 3rd party to offer end to end solutions to address the supply chain needs of our customers.

 

MobiVUE[TM] , a software product developed by BCIL, leveraging its vast domain knowledge is the answer to visibility challenges that organisations face in complex supply chain...

Read more


Website: barcodeindia.com

American Barcode • Phoenix • Arizona • amerbar.com

Happy Holidays! In addition to celebrating the holidays this month, American Barcode and RFID is also celebrating our 30th year in business. 30 years is a long time.а

REQUEST TO REMOVE American Barcode and RFID Company...

http://www.abrfid.com/American-Barcode-and-RFID-Company-Information

American Barcode and RFID Company Information About American Barcode and RFID . Why should a customer choose...

Read more


Website: tuugo.us

RFID industrial-grade handheld reader-RFID handheld reader ...

CF-H5202U

Barcode, UHF

  The CF-H5202product is an industry-level handheld terminal developed, designed, and produced based on features of different industries by CHAFON Co., Ltd. (hereinafter referred to as the Company). The CF-H5202 series adopt ergonomic design and is compact and flexible, shock-proof, and drop-proof. The CF-H5202 series can work in the standby mode for a long time. In...

Read more


Website: http://www.chafon.com

Related topics : uhf rfid bluetooth handheld reader / handheld uhf rfid reader / handheld rfid reader with gps / handheld rfid reader gps / small handheld rfid reader

Hardware - MID Fingerprint

MID Fingerprint | Radio-frequency Identification (RFID) Hardware

Transponders

The ID100 transponder has a long history of use in the animal industry throughout Europe, the first design that is available still only in Europe, the same high quality transponder that comes with the ID100US with a different delivery system.

The ID100US is the latest in our range of transponders. A 11.5mmx2.2mm...

Read more


Website: http://www.midfingerprint.com

Related topics : rfid reader long read range / rfid reader read range / rfid tag reader long range / long range rfid reader module / rfid long range reader

RFID Services | Triptych Solutions

RFID (Radio-Frequency Identification) is the most robust and cost-effective technology available for managing or tracking. This technology is transforming many industries by offering real-time visibility into inventory and product movement thus helping to improve productivity and loss prevention. An RFID tag serves the same purpose as a barcode; providing a unique identifier for that object. Yet...

Read more


Website: http://triptychglobal.com

Key Card Access Control Systems In Toronto | Veridin ...

KEY CARD ACCESS CONTROL SYSTEMS

Key Card Access Control Technology to Improve Your Facility's Security

Veridin offers facility key card access control systems that protect your organization by ensuring that only authorized personnel are granted entry to your property or secured location.

With a key card access control system from Veridin you can:

Completely control facility access

Protect your...

Read more


Website: http://www.veridin.com

Free Serial for RS232, RS422, RS485 ... - Windmill Software

Free technical support for life

For instruments communicating over RS232, RS422, RS485, Modbus and TCP/IP

Understands ASCII, binary and hexadecimal data

For serial instruments that continually send data and those that need prompting

Quickly identify and correct communication errors

Insert cyclic redundancy checks (CRCs)

Send 4-byte (32-bit) integers, 4-byte words (double words), ASCII characters,...

Read more


Website: http://www.windmill.co.uk

Related topics : rfid card reader serial output / rfid card reader software free download / rfid reader software free download / rfid card reader software free / free rfid software download

RFID Attendance System For School Students With SMS

�In/Out SMS to parents' mobile on enrty/exit of student from school

�Mobile App and Web login for Parents

� Online School ERP, Report Card, Fees, Certificates, Payroll

�Daily absent employees report to school management.

�Free employee attendance

�SMS Notifications for events, Birthday Wishes

�Automate school attendance, customized reports

Why School Pixa

�System under client's...

Read more


Website: http://schoolpixa.com

Related topics : rfid smart card based school student attendance system / rfid card attendance system / rfid reader attendance system / rfid id cards in schools / rfid student id cards

RFID Technology and Multi-Agent Approaches in Healthcare ...

Our team is growing all the time, so we're always on the lookout for smart people who want to help us reshape the world of scientific publishing.

Open access peer-reviewed chapter

RFID Technology and Multi-Agent Approaches in Healthcare

By Felicia Gi za , Cristina Turcu and Cornel Turcu

Submitted: November 27th 2010Reviewed: June 10th 2011Published: August 17th 2011

DOI: 10.5772/23561

Stefan cel...

Read more


Website: intechopen.com