Regency Systems R2C

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The R2C was the color version of the 2nd Z80-based microcomputer produced by Regency Systems of Champaign, Illinois, the first being the RC1. The RC1 had a high resolution display and dual 8-inch floppy disk drives. It was essentially a standalone PLATO environment, adapting the TUTOR language and environment. The company was founded by David Eades, a real-estate agency owner, and Paul Tenczar, creator of the TUTOR language.

Microcomputer small, relatively inexpensive computer

A microcomputer is a small, relatively inexpensive computer with a microprocessor as its central processing unit (CPU). It includes a microprocessor, memory, and minimal input/output (I/O) circuitry mounted on a single printed circuit board. Microcomputers became popular in the 1970s and 1980s with the advent of increasingly powerful microprocessors. The predecessors to these computers, mainframes and minicomputers, were comparatively much larger and more expensive. Many microcomputers are also personal computers.

Champaign, Illinois City in Illinois, United States

Champaign is a city in Champaign County, Illinois, United States. The city is 135 miles (217 km) south of Chicago, 124 miles (200 km) west of Indianapolis, Indiana, and 178 mi (286 km) northeast of St. Louis, Missouri. The United States Census Bureau estimates the city was home to 87,432 people as of July 1, 2017. Champaign is the tenth-most populous city in Illinois, and the state's fourth-most populous city outside the Chicago metropolitan area. It is included in the Champaign–Urbana metropolitan area.

PLATO (computer system) mainframe computer system

PLATO was the first generalized computer-assisted instruction system. Starting in 1960, it ran on the University of Illinois' ILLIAC I computer. By the late 1970s, it supported several thousand graphics terminals distributed worldwide, running on nearly a dozen different networked mainframe computers. Many modern concepts in multi-user computing were originally developed on PLATO, including forums, message boards, online testing, e-mail, chat rooms, picture languages, instant messaging, remote screen sharing, and multiplayer video games.

The R2C supported an Ethernet network and a hard drive. The introduction of the IBM AT, with 16-bit processor, hard drive, and EGA display, sparked a change in direction for the company away from hardware.

Ethernet computer networking technology

Ethernet is a family of computer networking technologies commonly used in local area networks (LAN), metropolitan area networks (MAN) and wide area networks (WAN). It was commercially introduced in 1980 and first standardized in 1983 as IEEE 802.3, and has since retained a good deal of backward compatibility and been refined to support higher bit rates and longer link distances. Over time, Ethernet has largely replaced competing wired LAN technologies such as Token Ring, FDDI and ARCNET.

In computer architecture, 16-bit integers, memory addresses, or other data units are those that are 16 bits wide. Also, 16-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size. 16-bit microcomputers are computers in which 16-bit microprocessors were the norm.

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Canadair CT-114 Tutor military training aircraft family by Canadair

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HP 9800 series family programmable calculators and desktop computers

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Ohio Scientific

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On Microsoft Windows, a special folder is a folder which is presented to the user through an interface as an abstract concept instead of an absolute folder path. Special folders make it possible for any application to ask the operating system where an appropriate location for certain kinds of files can be found; independently of which version or user language of Windows is being used.

Selenium is a portable framework for testing web applications. Selenium provides a playback tool for authoring functional tests without the need to learn a test scripting language. It also provides a test domain-specific language (Selenese) to write tests in a number of popular programming languages, including C#, Groovy, Java, Perl, PHP, Python, Ruby and Scala. The tests can then run against most modern web browsers. Selenium deploys on Windows, Linux, and macOS platforms. It is open-source software, released under the Apache 2.0 license: web developers can download and use it without charge.

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