Answer: Lotus 1-2-3, oops I mean Microsoft Excel. Sorry, but for those of us trained on Lotus 1-2-3 back in the late 80s, early 90s, it is still a bitter pill to swallow that Excel dominates the spreadsheet market.
From WSJ At Work Blog:
The most commonly required skills are also the most basic ones: spreadsheet and word-processing software such as Microsoft Corp.’s Excel and Word…
So, in keeping with this theme, I wanted to highlight our spreadsheet activities to develop your students’ spreadsheet skills: