This book provides readers with a useful, informative guide to designing and building their own custom MS-DOS Terminate and Stay Resident Utilities (TSRs) using the Borland Turbo Assembler, Turbo Pascal, and Borland C++. Designed for all levels of computer users, this book provides overviews on TSRs, memory, and interupts as well as guiding users through the actual creation of TSRs.