List of computer size categories. From Wikipedia, the free encyclopedia. This illustration shows the development of computers, from huge room-sized computers in the 1940s and 1950s (left-most photo) to smaller personal computers over the 1980s to the 2010s.
New US DOT Hazmat Safety Rule to Place Lithium Battery Limits in Carry-on Baggage on Passenger Aircraft Effective January 1, 2008. Passengers will no longer be able to pack loose lithium batteries in checked luggage beginning January 1, 2008 once new federal safety rules take effect.
Effective January 1, 2008, the following rules apply to the spare lithium batteries you carry with you in case the battery in a device runs low: 1  Spare batteries are the batteries you carry separately from the devices they power. 2  You may not pack a spare lithium battery in your checked baggage.