What is a .PDF-1 file?
A .PDF-1 file is really just a regular PDF document that someone has changed to end with ".pdf-1" instead of just ".pdf". People might do this to show that it's the first part of a series of PDFs, or for some other organizational reason. PDFs are super common for all sorts of documents because you can open them on almost any computer or phone, and they look the same everywhere.
Even though it's called a PDF-1, you can open it with any program that works with regular PDF files. However, you might need to change its name back to end in ".pdf" first. Some of the programs that can open these files include: - **KDE Okular** and **Evince**: These are free programs that work on Linux computers. They're great for looking at PDFs. - **LibreOffice**: This is a free office suite that's a bit like Microsoft Office, and it can open PDFs too. - **Adobe Acrobat DC** and **Adobe Acrobat Reader DC**: Adobe makes the PDF format, so their programs are super good at handling PDF files. Acrobat Reader is free, and Acrobat DC is the paid version with more features. - **Microsoft Word 365**: Yes, you can even open PDFs with Word, though it might turn the PDF into a Word document when you do. - **Google Chrome**: This web browser can open PDF files right in a browser tab, so you don't need any special software. - **Apple Preview and Pages**: If you're on a Mac, these programs that come with your computer can open PDFs. Preview is for viewing, and Pages is more for editing.
If you've got a .PDF-1 file, just rename it to end in ".pdf" by clicking on the file name and changing it. After that, you can open it with any of these programs. If you ever need to change it back to .PDF-1, just rename it again the same way.
Verification
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