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Basic Computer/IT QUESTION #11461
Question 1
What file extension is used for spreadsheets created in Lotus 1-2-3?
  • .123✔️
  • .DOC
  • .WK1
  • .XLS
Correct Answer Explanation
Lotus 1-2-3 saved files with the .123 extension (or .WK1 for earlier versions). Lotus 1-2-3 was the dominant spreadsheet before Microsoft Excel and was the 'killer app' that made the IBM PC popular in the 1980s. .DOC = MS Word; .XLS = Microsoft Excel.