Earlier quoted context omitted.
Digital Audio Workstation. Think Ableton Live, Apple Logic Pro, Avid's Pro Tools, FL Studio, Cakewalk Sonar, Propellerheads Reason... tools to record/arrange/produce/master music.
They are all different beast that once you learn one you don't want to relearn another. The only difference is that Abelton Live and Bitwig (Runs on Linux) are designed for live performance. I like Reaper (Cost is 1/5 but equally capable) and it also runs reasonably well under Linux. https://linuxmusicians.com/viewtopic.php?t=15280 Actually many people never pay for a license it has a similar model as Sublime Text.
Ableton, at least, also functions perfectly fine in the traditional piano-roll and timeline paradigm of DAW workflow too. Don't let the 'Live' part of the name mislead you into thinking it's only for live performers; it does everything the 'old DAWs' do, AND it's got great features to assist in live performance.
Also in terms of underlying concepts, if you know one DAW well, you can usually learn another one fairly quickly, as it becomes more a question of learning the interface more than anything else.