Tag: DOS

DOS 4.1 Manual released by A.P.P.L.E.

Brian Wiser
Posted by: Brian Wiser Date: February 1, 2019
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Seattle, Washington — February 1, 2019 — Apple Pugetsound Program Library Exchange (A.P.P.L.E.) and Walland Philip Vrbancic, Jr. are proud to announce his new DOS 4.1 Manual: Disk Operating System for the Apple II.  This book is in print for the first time, features a newly-designed cover, and is over 240 pages. DOS 4.1 is a reimagined Disk Operating System for the Apple II computer, released in 2018. Programmed by Walland Philip Vrbancic, Jr., a professional programmer since 1983. It…