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 […]