5. Microsoft. Could arguably live without Windows and Office (via either OSX or Linux), but at present it underpins all that I do on a computer. 4. Alphabet. A

5. Microsoft. Could arguably live without Windows and Office (via either OSX or Linux), but at present it underpins all that I do on a computer. 4. Alphabet. Alphabet/Google products are the next layer I use on top of MS products, therefore are the next hardest to remove. 3. Facebook. The next layer again; MS and Alphabet provide general case tools, FB is a particular implementation on top of those, so it would go before either of the above two. 2. Amazon. No Amazon in Australia anyway, no big loss. 1. Apple. Only Apple product/service I use is a keyboard. Happy to see it go.