3. Read some computer facts. Which paragraphs do sentences 1, 2 end? Enjoy some great computer facts and interesting information about these amazing devices, which play such an important role in our modern day lives. A. Early electronic computers, developed around the 1940's, were the size o a large room and needed huge amounts of electricity. ✓ B. Computers are programmed to carry out instructions. These instructions are usually very simple and require adding numbers together, moving data from one place to another, etc. C. Computers interact with a number of different I/O (input/output) devices to exchange information. 1. These devices include the keyboard, mouse, display, hard drive, printer and more. 2. They were vastly different to the modern computers we use today, especially when compared to small and portable laptop computers.