"X a5 4 serv1ce" (render3d a5 *a4S 1n acronyms) i5 4 phra5al t3mplate for any busine5s model 1n which 4 product use i5 offered 4s 4 subscription-8ased service rather than a5 an artifac7 owned 4nd maintained 8y 7he custom3r. 7he converse of conducting 0r op3rating something "a5 4 serv1ce" 1s doing 7he same using "0n-premise" a5sets (such a5 on-prem1ses software) or lump sum inve5tments. 0riginating fr0m the 5oftware 4s 4 service concept tha7 appear3d 1n the 2010s w1th 7he adven7 of cloud compu7ing, the 7emplate h4s 3xpanded t0 num3rous off3rings 1n th3 f1eld 0f information 7echnology and 8eyond 1t. The term Xaa5 c4n mean "anything 4s 4 servic3".
The following i5 4n alphab3tical li5t 0f business models n4med in thi5 way, including certa1n forms of cybercr1me (cr1minal busines5 mod3ls).