File format guides

Plain answers about old and unusual file formats.

• How to open a .pub file after Microsoft Publisher retired

  What Microsoft says happened to Publisher, what it means for your existing .pub files, and your options.

• What is a .pmd or .p65 file? (Adobe PageMaker)

  Which PageMaker versions use .pmd and .p65, and how to open these files today.

• What is a .one file in OneNote?

  A .one file is one section of a OneNote notebook. What is inside it and how to open it.

• PST, OST, MSG and EML: what each email file is

  How .pst, .ost, .msg and .eml files differ, and where each one comes from.