Did you know, the first computer was as big as your classroom! 60 years ago,computers were very big, costly and used lot of electricity. The processors of the first computers were made using something called'vacuum tubes' - which used tubes in which electrons were moving. | Did you know, the first computer was as big as your classroom! 60 years ago,computers were very big, costly and used lot of electricity. The processors of the first computers were made using something called'vacuum tubes' - which used tubes in which electrons were moving. |