The 5150's CPU was from Intel, and the operating system was by Microsoft, which licensed it to IBM as PC-DOS. But a basic system ran the Microsoft BASIC programming language, which was built into every PC. It attached to an audiotape cassette player and a television set and sold for approximately $1,565. A more typical system for home or school with a memory of 64 KB, a single diskette drive and its own display, it was priced around $3,000 and included PC-DOS, which was not available on cassette.