For transportation.
the busiest.
because they love it
Operating systems are designed to manage computer hardware and software resources
It depends on what subway system you're talking about. Lots of major cities have subway systems.
Yes. You might want to try googling "subway systems in Alberta"
There is no objective answer. They produce different things and have different outlets and delivery systems.
If you mean metro systems: 0 If you meant the restaurant Subway: 0
supplementary restraint systems
There are 4 subway or underground metro systems in the United Kingdom: the Glasgow Subway, the London Underground, the Docklands Light Railway, and Tyne & Wear Metro in Newcastle. Maps for all may be located on their respective websites.
New York City transit services offers a subway system and buses. The subway is call "NYC Transit Subway" and the bus systems are "New York City Transit" and "MTA Bus".
Most operating systems are designed for either 32-bit or 64bit CPU's.
perhaps squids and clams.