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From the archives of Roger Wagner and his company at the time, Southwestern Data Systems—an Apple Computer binder labeled "Pascal Reference Manual for the Lisa - Beta Draft," containing the April 1983 beta draft of the Pascal reference manual, stamped on the title page: "A6D0191K, Pre-Rel Pascal." Includes three Apple Lisa FileWare ('Twiggy') 5.25˝ floppy disks for Pascal, all dated 1983 as the "A5+ Release," labeled "Pascal 0," "Pascal 1," and "Pascal 2." In overall very good to fine condition, with a few tears to binding holes of the reference manual's loose-leaf pages.
The Apple Lisa 1 originally shipped with dual 5.25˝ FileWare floppy drives, codenamed 'Twiggy,' which were expensive to produce and proved to be unreliable. In early 1984, Apple introduced the Lisa 2, which used a single 400K Sony 3.5˝ microfloppy drive in place of the infamous 'Twiggy' drives. A free upgrade was offered to Lisa 1 owners, most of whom took advantage as it vastly improved the system's reliability and performance. As such, Twiggy-compatible FileWare diskettes were rendered obsolete shortly after their development, and are very scarce today.
Using the Lisa, these materials were used by Wagner as an early developer for the Macintosh, and his company was listed on one of the first posters for the Macintosh that also featured Bill Gates and other Mac developers.
