In Computer Science, a word is generally 16 bits. On some lower processors used in Electrical Engineering, a word can be 10, 12, or 14 bits as well. 32-bit data elements are instead referred to as double word (Intel) or long word (Motorola, 68k series). 64-bit elements do not have a name that I am aware of, and 128-bit (16-byte) elements have been called paragraphs on some systems. A much looser term, page, can mean anywhere from 16k to many megabytes. It is, however, useful to know the specific meaning of page for a system you are programming on, as it is often a hardware efficiency issue. (The last statement applies to low-level languages only, as otherwise you wouldn't have much control over hardware efficiency anyway.)