Window shade collapses the window to just the title bar. Scroll buttons allow you scroll up and down on the menu of you files, and right and left on you menus. Start allows access to all programs and other items similar to the apple on the Mac. Then user tells OS to create a second document - OS then creates another document of whatever length behind first document. Third document is created that is 20 bytes long behind first two.
OS sets flag that says document area is now available.
In DOS there is program called undelete which goes into OS and marks it as available again. To totally erase an email article - each byte on the computer for the document must be overwritten with a zero, a one, and then a zero. Internal hard Circle drives can only be open in clean, pressured room. Can have multiple heads. Stan Reder Vice-Pres.