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A+ Hardware Service Technician: Computer Hardware, System Boards, and Storage Devices Types of PCs There are several types of Personal Computers you should be aware of: small form factor, minitower, midtower, full tower, desktop. A small form factor is the smallest of the non-portable PCs. Typically lacking in many expansion options, SFF computers are useful for situations which require the smallest desktop style PC possible. A minitower PC is a common household and business PC. It usually has some expansion slots available (1-3) and one hard drive slot available. A typical minitower PC has all of the ports built in to allow for more expansion cards. A midtower PC is also a common business class machine. A midtower has more expansion room than a typical minitower machine. A full tower has the most expansion room and usually several hard drive bays open for additional storage drives. A desktop has probably been the most popular type of machine over the years. A typical desktop machine is designed to lay flat on a desk or stand and contains 1-3 additional drive bays and 2-7 additional expansion slots available.
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