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:

• 1 nibble = 4 bits
• 1 byte = 2 nibbles
• 1 wyde = 2 bytes
• 1 tetrabyte = 2 wydes
• 1 octabyte = 2 tetrabytes