[TeMPOraL]

iOS mainstreamed it, but for a long time, "app" had a different meaning. Like, "application" was the big full-featured thing you run on your PC; "app" was the toy thing you run on the phone.

Then some "genius" started calling their desktop offerings "apps" (perhaps because lazy multiplatform-via- webap development eventually extended to marketing copy"), and now everything is an "app".