Comment by chrismorgan

5 years ago

.doc, .ppt, &c. were fully custom. .docx, .pptx, &c. are ZIP files. Remember that this was written in 2014, and many people were still using the old formats then, because many people didn’t have Office 2007 or newer or software that could cope with this new format. (Now I think very few people still use the old Office formats.)

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chrismorgan

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zzo38computer  5 years ago

No, .doc, .ppt, etc are wrapped file of files, although not using a ZIP container format. I also believe Visual Pinball uses the same container format as Microsoft Word. 7-Zip just calls this format "Compound", although there are other names for it, such as "DocFile" and "POIFS". I just tried now such a file, and I got the following listing from 7-Zip:

     Date      Time    Attr         Size   Compressed  Name
  ------------------- ----- ------------ ------------  ------------------------
                      .....        35842        36352  WordDocument
                      .....          106          128  [1]CompObj
                      .....         4096         4096  1Table
                      .....         4096         4096  Data
  2007-12-25 22:33:00 D....                            ObjectPool
                      .....         4096         4096  [5]DocumentSummaryInformation
                      .....         4096         4096  [5]SummaryInformation
  ------------------- ----- ------------ ------------  ------------------------
                                   52332        52864  6 files, 1 folders