Bits and bytes
	Physical representation
		"Bits is bits": 10101100011
		bit: single binary digit, value 0 or 1
		nybble: 4 bits
		byte: 8 bits
		halfword: 16 bits (2 bytes)
		word: 32 bits (4 bytes); can vary with machine architecture
			32-bit architecture in this class
		doubleword: 64 bits (8 bytes)
		bit string: any number of consecutive bits (11 bits in example)