Examples 300px|Size comparison of various mobile form factors (from smallest to largest: Nintendo DS Lite handheld, Asus Eee PC netbook, and MacBook laptop) Computer form factors comprise a number of specific industry standards for motherboards, specifying dimensions, power supplies, placement of mounting holes and ports, and other parameters. Other types of form factors for computers include: Small form factor (SFF), a more loosely defined set of standards which may refer to both motherboards and computer cases. SFF devices include mini-towers and home theater PCs. Pizza box form factor, a wide, flat case form factor used for computers and network switches; often sized for installation in a 19-inch rack. 
Examples 300px|Size comparison of various mobile form factors (from smallest to largest: Nintendo DS Lite handheld, Asus Eee PC netbook, and MacBook laptop) Computer form factors comprise a number of specific industry standards for motherboards, specifying dimensions, power supplies, placement of mounting holes and ports, and other parameters. Other types of form factors for computers include: Small form factor (SFF), a more loosely defined set of standards which may refer to both motherboards and computer cases. SFF devices include mini-towers and home theater PCs. Pizza box form factor, a wide, flat case form factor used for computers and network switches; often sized for installation in a 19-inch rack. All-in-one PC "Lunchbox" portable computer
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All-in-one PC "Lunchbox" portable computer