Question

mark dean

1. time period:
2. what did the term computer mean?
3. main contribution:

Explanation:

1. The time - period related to Mark Dean is not provided in the given text, so it cannot be determined.
2. The original meaning of the term 'computer' has evolved over time. Initially, it referred to a person who performed calculations. Later, it came to mean a machine that could perform arithmetic and logical operations automatically.
3. Mark Dean is known for his contributions to computer technology, such as being involved in the development of the IBM Personal Computer (PC). He holds several patents related to PC technology.

Answer:

1. Cannot be determined from the given text.
2. Originally a person doing calculations, later a machine for arithmetic and logical operations.
3. Contributions to IBM PC development and related patents.