Quite. Encyclopædia Brittanica, and the 5% rule for photocopying. Later it was CD encyclopædias like Microsoft Encarta - the use case that persuaded my parents

Quite. Encyclopædia Brittanica, and the 5% rule for photocopying. Later it was CD encyclopædias like Microsoft Encarta - the use case that persuaded my parents to buy a new-fangled "sound card", as opposed to the ulterior use case (to play Doom)...