System 2

System 2 (System Software 0.3 and 0.5) introduced the second major upgrade to the Macintosh system software. Version 2.0 was released in April 1985 and includes the System 2.0 update, followed shortly after by System 2.1 which provided HD20 HFS support.
==Versions of System 2==
* System 2.0
* System 2.1
==References==
*Macworld Mac SECRETS by David Pogue, 5th Edition p.295-296. 1999.
==External links==
*Apple Macintosh before System 7
*The Early Mac OS: System 1 - 2 at the Apple Museum
*Mac System Software 2.x at BetaWiki
*Classic Mac OS: System 1, 2, 3, and 4 at Wikipedia
Category:1985 introductions
Category:Discontinued Apple software