PORTABLE SMALL-SIZED ELECTRONIC COMPUTER

PURPOSE:To reduce the size of a device by using a main body which has a central controller, a storage device, a display device, and an inputting means, an interface circuit for peripheral equipment including a signal bus and a driver, and an input and output equipment which has a fixed terminal attachable to and detachable from the main body. CONSTITUTION:A main body 1 has an inputting means 12 composed of a display device 11 and a keyboard. The main body 1 and an input and output equipment 3 are connected detachably by a fixed terminal, and a power source terminal 32 engaged during attachment is separated from the fixed terminal 39, so that the both are connected electrically and held mechanically. When the power source terminal 62 of a power source device 6 is engaged, the input and output equipment 3 is powered up and a charging current is supplied to the battery of the main body 1 through the power source terminal 32.