Answer: D) Analytical Engine Explanation: Computer was invented by Charles Babbage. The First Mechanical Computer Designed by Charles Babbage, a British mathematician was called as Analytical Engine which resembles today's modern machines  between 1833 and 1871.

Answer: A) Memory Explanation: In a computer, the area where the data is stored for the quick access by the computer's processor is called Main storage or Primary storage or Memory or RAM.   Hence, main storage is also called Memory.

Answer: C) Basic Input Output System Explanation: BIOS in computers stands for Basic Input Output System.   BIOS is a set of computer instructions in firmware which control input and output operations.

Answer: B) Central Processing Unit Explanation: In a computer, memory is one part of Central processing unit i.e, CPU.