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)
	Logical representation
		bits + context = information
		consider bit string with k bits (k = 6)
			b5	b4	b3	b2	b1	b0
			0	1	1	0	1	0
		value:
			b5 * 25	b4 * 24	b3 * 23	b2 * 22	b1 * 21	b0 * 20
			0 * 32	1 * 16	1 * 8	0 * 4	1 * 2	0 * 1
			0	16	8	0	2	0
				16	+   8		+   2		=   26ten