Back pain can also result from more-serious injuries, such as a vertebral fracture or ruptured disk; from arthritis and other age-related changes in your spine; and from certain infections. Possible causes of back pain include: 1  Ankylosing spondylitis.  Meralgia paresthetica.
Noun. 1. microcomputer-a small digital computer based on a microprocessor and designed to be used by one person at a time. PC, personal computer. desktop computer-a personal computer small enough to fit conveniently in an individual workspace.
A supercomputer is mainframe computer that has been optimized for speed and processing power. The most famous series of supercomputers were designed by the company founded and named after Seymour Cray. The Cray-1 was built in the 1976 and installed at Los Alamos National Laboratory.