The pivot table, the spreadsheet's most powerful tool (2020)
It's too bad that the pivot table is a poor approximation of a true multidimensional spreadsheet, for example Lotus Improv: <a href="https://instadeq.com/blog/posts/no-code-history-lotus-improv-spreadsheets-done-right-1991/" rel="nofollow noreferrer">https://instadeq.com/blog/posts/no-code-history-lotus-improv...</a>