Someone who or something that joins things together in a series or a sequence of items of the same type: With computers, a concatenator is a utility that simplifies the task of merging multiple Portable Document Format (PDF) files into one document.

The concatenator combines all the pages from the selected PDF to present and to exchange documents reliably, independent of software, hardware, or operating system for someone's computer.

PDF files provide electronic images of text, or text and graphics, that look like printed documents and can be viewed, printed, and electronically transmitted by concatenators.