filename extensions
Document type indicators
Filename extensions are the suffixes at the end of a computer filename, typically following a period, that indicate the file's type or format: .jpg, .pdf, .docx.
Operating systems use extensions to determine which program should open a file.
Some extensions indicate executable programs (.exe), others documents or media.
Users rarely see extensions on modern systems unless they look for them.
- formatsArrangements or structures
- filenamesLabels for stored data
- tarsSailors, informally
- filetypesDigital document categories
- suffixWord-ending addition
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