Ex.5. Insert the suitable words or word combinations into the following sentences. The words are given below.

1. Computers are used…a wide variety of activities.

2. Computers….in a wide range of sizes and power.

3. Programmable computers…enormously in their computational power, speed, memory and physical size.

4. Workstations…to personal computers.

5. Mainframe computers have more memory speed and capabilities than…

6. The most powerful mainframe computers are called….

Supercomputers; to vary; to perform; are similar; workstations; to exist.