This document contains a student's answers to questions about uses of computers. It discusses how mainframe systems are limited in the number of tasks they can perform due to their specialized and expensive nature. At home, the most popular use of personal computers is for gaming, while businesses use them for tasks like word processing, accounting, and running spreadsheets. The military uses computers in many roles, from basic measurement and calculation to core functions in almost every military branch. Computer technologies also help train surgeons through interactive programs and virtual reality simulations that allow practicing complex procedures without risking lives.