This strip appeared in issue #10 of Linux Voice magazine, which featured an article about Linux vs Windows and came out shortly after Microsoft announced that the next release of their operating system (after Windows 8 & 8.1) would be called Windows 10.
Elvie: My niece tells me that she's got a new teacher who used to work for Microsoft.
[Panel 2: Inside the headmaster's office]
Elvie: I hope he won't be teaching the kids that computing starts and ends with Word and Excel.
Headmaster: I think you've misunderstood -- he's not an I.T. teacher -- he's teaching maths.
[Panel 4: In the classroom the teacher is talking to Elvie's niece]
Teacher: Now Jessica, what number comes after eight?
Jessica: Nine, sir?
Teacher: No, no, no. Don't you remember what I taught you about the 'Number Line'?
[The blackboard behind them reveals that the number line runs as follows:
1, 2, 3, 95, 98, ME, XP, Vista, 7, 8, 10 - with arrows indicating the location of
the "decimals", 3.1 and 8.1]