Borland SideKick

Borland SideKick is a PIM (Personal Information Manager), introduced by Philippe Kahn in 1983. It was originally known as TSR software or a Terminate and Stay Resident program until it was transferred to windows and finally became a PIM. It simply works by loading in the memory then enables computer to go back to its DOS command prompt. This sequence allows users to pull up another application by pressing Control + Alt that were set as its hotkey by default. Immediate task switching in a DOS programmed in single-tasking was made possible by Borland Sidekick. It comes with other features such as calculator for scientific, business, formula and programmer purposes. It has a personal calendar and phone dialer or address book. It also includes a Notepad text editor that can hold up to 9 files and a terminal communication program, called ASCII chart.