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Wydes, Tetrabytes, Octabytes

A nibble is 4 bits, a byte is usually 8 bits and Donald Knuth coined the word wyde for 16 bits.

In The Art of Computer Programming, Volume 1, Fascicle 1: ⅯⅯⅠⅩ, Knuth also uses tetrabyte and octabyte for 32 and 64 bits: