This specific category of computers existed primarily in the 1980s.

This is the first year that category has existed.

This category was cancelled after 2003, and did not exist before 2002.

Different categories exist within the J-1 program, each defining the purpose or type of exchange.

All those categories existed and were on sale for a while, but not really widely adopted.

Up to now, I have assumed that category 3 exists to fund internal policies.

But it must point out that another category of ports exists.

The category existed separately from native and foreign players at intervals until the 1970s.

The category for which he won and was nominated no longer exists.

His chance of setting the record was good, he was told, because no such category existed.