There are no mainframes now in use worldwide.

How many Internet users are there worldwide?

Since two thousand five, what has happened to the number of Internet users worldwide?

Why did mainframes get their name?

What has replaced mainframes since the 1980-s?

IBM is the only big firm that still sells mainframes.

What did IBM do to get customers use mainframes for more functions?

Why do some companies still run crucial applications on mainframes?

Some companies like mainframes because they are reliable and secure.

IBM has never bundled mainframes with applications at a discount.

Mainframes were dethroned by distributed systems.