Also , the first simple operating systems became available with first - generation computers 同時(shí),第一個(gè)簡(jiǎn)單的操作系統(tǒng)隨著第一代計(jì)算機(jī)而出現(xiàn)。
First - generation computers were characterized by the use of vacuum tubes as their principal electronic component 第一代計(jì)算機(jī)的特色是使用真空管為其主要電子器件。
Vacuum tubes are bulky and produce a lot of heat , so first - generation computers were large and required extensive air conditioning to keep them cool 真空管體積大且發(fā)熱嚴(yán)重,因此第一代計(jì)算機(jī)體積龐大,并且需要大量的空調(diào)設(shè)備保持冷卻。