SideKick by Borland International, was a popular and simple RAM-resident desktop organiser for computers running the DOS operating system, and consisted of five windows for a Notepad, Calculator, Calendar, Dialer, and ASCII table.
SideKick's Notepad was an ASCII text editor that resembled WordStar. Although it was not a fully-fledged word processor, it was remarkably complete. The ASCII table was a handy reference for programmers. The Phone Dialer dialed a phone number found anywhere on the screen - it didn't need to be in SideKick.
The ASCII table, binary, and hexadecimal support in the Calculator and the familiar WordStar interface in the Notepad, made SideKick popular with programmers. Research SideKick