CompuServe Information Manager

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CompuServe Information Manager or CIM was CompuServe Information Service's client software. The program was a GUI front end to the text-based CompuServe service, which initially could be accessed using a standard terminal program using alphanumerical shortcuts.

Issued at the same time as the GUI-only America Online began to grow in popularity, CIM was available for MS-DOS, Macintosh ("MacCIM"), and Microsoft Windows ("WinCIM"), and allowed access to CompuServe's features, such as its forums, chat, e-mail, and messaging facilities; these continued to be accessible via standard communications software using alphanumeric shortcuts. The first versions were released in around 1990. Version 2.0.1, released in 1994, included a version of the Mosaic web browser.[1]

Later, CompuServe switched parts of its service over to a new binary protocol called HMI, or Host Micro Interface, which was more of a binary machine protocol and was not useable directly via a telnet client like the old text based interface, thus requiring the use of specialised client software like CIM. Version 3.0, in 1997, was intended to compete head-on with AOL, and was released amid an advertising campaign in which CompuServe was briefly re-branded as "CSi."

After CompuServe was purchased by AOL in 1998, CompuServe began providing the AOL client software and its protocols as a way to access the service, however it continued to remain possible to connect to WinCIM via HMI, which became known as the CompuServe Classic service.

Other CompuServe client programs: