Most computers have additional system parts, such as an optical drive that will allow you to play and record music and video. References Computer Hope: What Is CPU (Central Processing Unit)?

In truth, the system unit is the most important aspect of a consumer-grade computer, at least, for now. Things might change in the future when cloud computing becomes the norm.

IBM on Tuesday revealed its map to the development of its large-scale, fault-tolerant quantum computer styled as "Quantum Starling." ...