Hardware, software and hardware include external devices of the host. The host computer includes a central processing unit (cpu) and memory. This includes read-only memory and random access memory.

External devices include input devices, mice and keyboards, output devices, monitors, printers, external memories, hard disks and floppy disks.

Software includes system software and application software.

The former includes operating system, language compilation system, database management system and service software.

Application software includes word processing software, information management software, graphics software, CAD software and various software packages. That's all.