An ASCII file is a type of file that contains human-readable text and represents characters using the American Standard Code for Information Interchange (ASCII) encoding system. Synonyms for ASCII file include plain text file, text document, and ASCII text file. These files are typically created and edited using simple text editors and can contain any type of plain text such as letters, numbers, and symbols. Most operating systems can read and write ASCII files, and they are commonly used in various applications that require the exchange of plain text data. Other synonyms for ASCII file include unformatted text file and raw text file.