'''C-Net DS2''' (Developers System, Second Generation) was a full featured, single-line, [[Bulletin Boardboard Systemsystem]] (BBS) software system released in [[1986]] for the [http://www.nationmaster.com/encyclopedia/Commodore-64 [Commodore-64]] microcomputer. The DS2 system was notable in that its authors proved that it was possible to perform significant and useful serious computing tasks on a hardware platform with such severely limited resources that even the manufacturer called it only a "game machine".
The Commodore-64 was a simple computer, based on a [[MOS Technology 6510|Motorola 6510]] [[8-bit]] [[microprocessor]], with 64k (that's K, for kilobytes) of [[RAM]] memory, only 38k of which was available for program text and variables that could be used by the built-in [[BASIC Languageprogramming language]] interpreter. Nevertheless, several different BBS programs were developed (including DS2) by various different independent programmers (mostly hobbyists not affiliated with any large software publisher) that enabled a System Operator ([[SysOp]]) run a single-user at a time, multiple member online community supporting: Threaded topical discussions; on-line gaming; information reference library; live chat mode with the console operator; file-sharing library; and the ability to create customized user experiences in BASIC, thus the Developers System title.
From an engineering standpoint, C-Net DS2 was remarkable in its use of [[Machine Languagelanguage]] modules, early multitasking technology, relocatable code, and modular program overlays. Although the user experience was entirely text-based and non-graphical, fast performance could be attained through the use of memory expansion modules, [[IEEE-488]] interface hard drives, and modem speeds including the mid-1980's state of the art: 19,200 baud.
Although the emergence of widely available public internet services has made private BBS systems obsolete in most of the developed free world, a dedicated core of enthusiasts remain in this new century who continue to tinker with vintage computers and keep software like DS2 running, despite the quaint limitations of the simple linear message threading system and the primitive keyboard-based, non-graphical games.
