1) Calculate 2) Cipher 3) Count 4) Cypher 5) Do a math job 6) Figure 7) French word used in English 8) Mark 9) Reason 10) Reckon 11) Register 12) To make sense 13) To reckon or calculate 14) Total 15) Use Windows 10 16) Work out Found on https://www.crosswordclues.com/clue/compute
compute 1. To calculate an answer or result; especially, using a computer. 2. To yield a result; especially, a correct result, from calculation: 'She found out that these numbers just don't compute.' 3. To use a computer or calculator. Found on http://www.wordinfo.info/words/index/info/view_unit/1803/2