IRIX
Silicon Graphics, Inc.
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FTR is an extension given to files used by the operating system called IRIX. It is a system specially developed by Silicon Graphics (SGI), which was dedicated to the company's devices. This efficient 64 – bit solution is based on the Unix kernel.

FTR files were likely used to store data used by the system for internal purposes. Currently, this format is considered unsupported and obsolete.

Linux

Updated 10/12/2021

.!c Graphics Converter Pro
.#$# ULead Photoimpact Temporary
.$ Visual Basic Symbol
.$$a OS/2
.$? TR-DOS ZX Spectrum File In HOBETA Format
.$b TR-DOS Basic
.$d TR-DOS Data
.$d$ OS/2 Planner Data

Last updated

.mmf 04/13/2023
.mup 04/13/2023
.itl 04/13/2023
.scs 04/10/2023
.crypt 04/10/2023
.pnp 04/10/2023
.tap 04/10/2023
.btr 04/03/2023