This document discusses different types of computer cases. It describes full tower, mid tower, mini tower, slim line, and small form factor cases. Full tower cases are the largest with 6-10 drive bays and a height over 30 inches. Mid towers are most common with 2-4 drive bays and a height of 18-24 inches. Mini towers have 2-3 drive bays and a height of 12-18 inches with limited expandability. Slim line cases hold the monitor on top. Small form factor cases minimize volume and come in various sizes.