every computer has two basic types of components, hardware and software.

hardware refers to the phsycial componets of the computer the devices that contain a seires of circuits that manipulate the lfow of inform atin. there are many different hardware compontnet in a computer, these are some examples:

processor (CPU)
physical memory
hard drives
floppy disk drives
sound cards
video cards
circuit boards (aka main boards, motherboards)