CompuServe in the context of "Special Interest Group"

The Graphics Interchange Format (GIF; /ɡɪf/ GHIF or /dʒɪf/ JIF, see § Pronunciation) is a bitmap image format that was developed by a team at the online services provider CompuServe led by American computer scientist Steve Wilhite and released on June 15, 1987.

The format can contain up to 8 bits per pixel, allowing a single image to reference its own palette of up to 256 different colors chosen from the 24-bit RGB color space. It can also represent multiple images in a file, which can be used for animations, and allows a separate palette of up to 256 colors for each frame. These palette limitations make GIF less suitable for reproducing color photographs and other images with color gradients but well-suited for simpler images such as graphics or logos with solid areas of color.

Tymshare, Inc was a time-sharing service and third-party hardware maintenance company. Competing with companies such as CompuServe, Service Bureau Corporation and National CSS. Tymshare developed and acquired various technologies, such as data networking, electronic data interchange (EDI), credit card and payment processing, and database technology. It was headquartered in Cupertino in California, from 1964 to 1984.

In 1984, Tymshare was acquired by McDonnell Douglas, to which Tymshare had sold its hospital accounting service in 1982. Tymshare was restructured, split up and portions were resold, spun off, and merged with other companies from 1984 through 2004 when most of its legacy network was eventually shut down. Islands of its network technology continued as part of EDI, into 2008.

Stephen Earl Wilhite (March 3, 1948 – March 14, 2022) was an American computer scientist who worked at CompuServe and was the engineering lead on the team that created the GIF image file format in 1987. GIF went on to become the de facto standard for 8-bit color images on the Internet until PNG (1996) became a widely supported alternative. The format later became the subject of a patent assertion by Unisys on its use of the LZW compression algorithm. Known as the inventor or creator of the GIF, Wilhite received a Webby Lifetime Achievement Award in 2013.

A bulletin board system (BBS), also called a computer bulletin board service (CBBS), is a computer server running software that allows users to connect to the system using a terminal program. Once logged in, the user performs functions such as uploading and downloading software and data, reading news and bulletins, and exchanging messages with other users through public message boards and sometimes via direct chatting. In the early 1980s, message networks such as FidoNet were developed to provide services such as NetMail, which is similar to internet-based email.

Many BBSes also offered online games in which users could compete with each other. BBSes with multiple phone lines often provided chat rooms, allowing users to interact with each other. Bulletin board systems were in many ways a precursor to the modern form of the World Wide Web, social networks, and other aspects of the Internet. Low-cost, high-performance asynchronous modems drove the use of online services and BBSes through the early 1990s. InfoWorld estimated that there were 60,000 BBSes serving 17 million users in the United States alone in 1994, a collective market much larger than major online services such as CompuServe.

AOL (formerly a company known as AOL Inc. and originally known as America Online) is an American web portal and online service provider based in New York City, and a brand marketed by Yahoo! Inc.

The service traces its history to an online service known as PlayNET. PlayNET licensed its software to Quantum Link (Q-Link), which went online in November 1985. A new IBM PC client was launched in 1988, and eventually renamed as America Online (abbreviated as AOL) in 1989. AOL grew to become the largest online service, displacing established players like CompuServe and Prodigy. By 1995, AOL had about three million active users.