June 15, 1993 — The Public Debut of PDF

On June 15, 1993, Adobe released Acrobat 1.0 for Macintosh and MS-DOS. With it came the public debut of PDF (Portable Document Format), which would go on to become one of the most widely used document formats in the world.

Today, PDF feels completely ordinary, but in the early 1990s the idea was quite unusual. Adobe was proposing a format that would look exactly the same on any computer and any printer, regardless of the operating system or installed software. This was a real problem at the time, since a document created in one application could appear completely different when opened in another. Adobe wanted to solve that problem.

Early users were not particularly enthusiastic about Acrobat. The software was expensive, PDF files were large by the standards of the day, and most people connected to the Internet through slow dial-up modems. Many saw little reason for yet another document format when Word and PostScript already existed.

Things began to change after Adobe made Acrobat Reader free. Suddenly anyone could open a PDF document without purchasing expensive software. That decision proved crucial. At the same time, Adobe opened up the PDF specification, allowing other developers to create their own PDF viewers. By the end of the 1990s, PDF had become the standard format for manuals, technical documentation, official forms, and countless other documents.

Today it is difficult to find a computer or smartphone that cannot open a PDF file. The format is used for electronic signatures, document exchange, scanned records, and many other purposes. What began as a new document format in 1993 eventually became the digital equivalent of paper.