Either natural gas, liquid propane, or diesel gas are utilized to run home standby generatorâs internal combustion engine to help avoid any disruption of electrical power. 1. Generac 6461 Guardian Series - The 6461 Guardian Series of automatic standby generators offer safe, clean air-cooled, and efficient operation.
The most famous implementation of hypertext is the World Wide Web.   Another Answer  A special type of database system, invented by Ted Nelson in the 1960s, in which objects (text, pictures, music, programs, and so on) can be creatively linked to each other.
Well, it's been that way since Christopher Sholes invented the typewriter in 1868 (U.S. patent 207,559 in 1878). Though there seems to be no logical reason why our keyboards bear such a weird matrix of letters, QWERTY keyboards have quite a rich history, and the layout is something we've grown accustomed to.