Moore, Gilder, Proebsting and Nordig's law

Moore: CPU power will double every 18 months.
Gilder: Bandwidth will double every 6 months.
Proebsting: compiler research has led to a doubling in computing power every 18 years.
Nordig: Any technology that surpasses 50% penetration will never double again (in any number of months). http://norvig.com/norvigs-law.html