The concept of the word size of an architecture is different than "word" which has long been used colloquially in computing to mean two bytes. 2 nibbles are a

The concept of the word size of an architecture is different than "word" which has long been used colloquially in computing to mean two bytes. 2 nibbles are a byte. 2 bytes are a word. Edit: "Word" as two bytes may actually be a microcomputer-specific colloquialism.