The answer to this question is the first generation computers. First generation computers are the first computers that used vacuum tubes and magnetic drums as the storage or memory for the datas. The first generation computers are very big and enormous that it can fit an entire room. First generation computers was developed and used during the year 1946-1959. The programming language used in this generation was the machine code. Also during this generation only large corporations can afford to buy this computer because it is too expensive. ENIAC, EDVAC, and UNIVAC are the example of computers during this generation.