In the early days of microcomputers, like the Apple II, people wrote complete applications in Assembly Language, such as the first spreadsheet program VisiCalc. Many video games were also written in Assembly Language to squeeze every bit of performance out of the hardware. These days, modern compilers like the GNU C compiler generate good code, and microprocessors are much faster; as a result, most applications are written in a collection of programming languages, where each excels at a specific function.