This is the 7603rd most frequent Portuguese word.
"PDF" in Portuguese refers to a digital file format used to share documents while preserving layout and formatting (Portable Document Format).
Here, 'PDFs' is pluralized to refer to multiple files or documents in this format.
Estou procurando um programa para editar PDFs.
I am looking for a program to edit PDFs.
Here, 'PDF' refers to a file format, specifically a document format used to distribute electronic documents.
Por favor, envie o PDF do relatório por e-mail.
Please send the PDF of the report via email.
In this context, 'PDF' implies a specific file of that format the speaker is referring to.