All computers use electricity, and are made to metric standards. Don’t be fooled by things like the, so-called, 3½” floppy or 17-inch screens; these are examples of hidden metric.
According to international standard (ISO/IEC 9529-1) floppies are 90 mm x 94 mm x 3.3 mm, with a mass of 24 g, and the magnetic media inside is 86 mm — not a 3½ anywhere!
All other computer components come with metric specifications. In addition to the clock speed of the computer, in megahertz (MHz), and the size of the memory, in megabytes (MB) and gigabytes (GB), all the fasteners and other parts of your computer, all the way down to the substrate to make the computer chips is metric.
Think Metric! 