[ketralnis]

No, it's not just the computer world.

Affordable housing where I live is a specific thing. Below-market-rate housing purchaseable/rentable with specific income requirements. Some number of units in new builds are usually required to meet this requirement. Your example sounds similar, it is also specifically defined and not just housing that is affordable but rather it meets specific requirements.

A cross-country flight to a pilot licence is a flight that goes greater than 50 nautical miles one-way. During flight training you need some number of these so you talk about them a lot during that training and it's mentioned a lot in the regulations.

And as I guess you're aware secure computation is also a term of art in CS for a specific thing.

I'm sure every field has terms of art that overlap with things whose words don't precisely describe. A chef's knife is a specific shape/class of knife, not any knife used by a chef. Law is full of them. There is a wealth of examples.

[seabass-labrax]

Thank you; I appreciate the explanation. I suppose the cross-country flight is so named as to preclude student pilots flying around and around in small circles to qualify?

[ketralnis]

I don't know why it's named that way but you need some number of cross-country flights and hours because there are skills that you pick up doing that (several kinds of navigation, fuel management, weather management, flight planning, map reading, etc) that you wouldn't by flying in circles or by spending time in the pattern (looped takeoffs and landings, which you do also need to do a fair amount of but builds a separate set of skills)