Fundamentals of Computers
Computer is not an acronym, it is a word derived from a word "compute" which means to calculate. So, in simple words you can say that computer is an electronic device which is used for fast calculation.
Some people say that COMPUTER stands for Common Operating Machine Purposely Used for Technological and Educational Research. It is only a myth because first this definition does not make any sense and second when the computer were invented they were just calculating machines which needs a lot of space for establishment.