Irrelevant, but (a) is technically incorrect. 'computerized devices, like smart TV s', do not necessarily require an "operating system" in order to function. If

Irrelevant, but (a) is technically incorrect. 'computerized devices, like smart TV s', do not necessarily require an "operating system" in order to function. If you removed the comma between 'devices' and 'like', then I think this would be correct.