I think is it a catch all for a variety of things

They consult!
I for example help out not for profits with whatever help they need that they may not currently have the skills in their team to do, and don't need to hire someone permanently - this might be project management, strategy, admin, reporting, HR, graphic design etc. I work for myself so I could say I am a business owner or CEO or something wanky like that , but I tend to say consultant, cos I don't know what else to call it![DOUBLEPOST=1444724208][/DOUBLEPOST]
I think even more single mums will after it goes belly up with Snez