OS File - opening and understanding

Did your computer fail to open an OS file? We explain what they are used for and recommend software that we know can open or otherwise handle your .OS files.

What is an OS file?

Developed by the makers of ObjectScript, the .os file extension can be referred to files that are distinguished as developer files that contain executable script with a list of commands and functions written in an ObjectScript programming language.

ObjectScript is a general purpose object-oriented programming language which is a functional superset of the ANSI-standard MUMPS programming language. It can run ANSI MUMPS routines with no change. ObjectScript has a number of implemented support for object-oriented programming, macro preprocessing language, embedded SQL for ANSI-standard SQL access to M's built-in database, procedure and control blocks using C-like brace syntax, procedure-scoped variables, and relaxed whitespace syntax limitations.

OS files can be converted into a standalone ObjectScript application by bundling the files into a .JAR file. ObjectDevel is one of the few specialized programs that can open and run .os files. It has a version for windows as well as for Mac.

How to open OS files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension OS for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 3 different OS openers which you will find listed below.

Suggest another file format using extension OS

While we know of one file format using the .OS file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .OS file.

Various viewers for this file format

These apps are known to open certain types of OS files. Remember, different programs may use OS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Reference ManagerReference ManagerUser submitted
WinEdtWinEdtUser submitted
OSByPetzlOSByPetzlUser submitted
We have not verified any software that we know for certain will work with OS-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with OS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!