I'm writing an article about DOCX, PDF and ZIP extensions. But first, I need to know the programs which are used to open these extension as default (without any third-party applications). I don't ...
Possible Duplicate: What does X denotes in ASPX, DOCX, XLSX, PPTX etc? It's one of those things you just take for granted until one day someone asks you and you realize you can't answer it. ...
Previously there were ASP, DOC, XLS, PPT etc and now ASPX, DOCX, XLSX, PPTX respectively. What does X denotes in ASPX, DOCX, XLSX, PPTX etc?