O

Object format

File type: Source code and script file

Files with o extension are mainly related to the object file format used by various programming languages and development environments.

Found 2 different file type records with the same o filename suffix.

.o (1)

What is o file?

File type category:
Source code and script file

Date updated: September 9, 2024

File extension o is traditionally used for Object file format. These files contain object code and any other related data typically produced by a compiler or assembler. Can also be referred to as Object code or Object module.

Many different object file formats are used, because originally, each computer type had its own unique format, but the file extension and purpose of these files was always the same.

Formats that use o file extension include a.out, COFF, ELF, PE, Mach-O, SOM, Hunk, MZ, ECOFF, XCOFF, NE and LX. These are found mainly used in Linux and Unix-like environment, gaming consoles and even some mobile phones.

Shared libraries (so files) are created from object files.

How to open o file?

The source code can be viewed and edited in many specialized applications.

How to convert o file?

There is no way how to convert *.o files to other formats.

Suggested software to open o file:

Microsoft Visual Studio

Associated software actions with the o file

Open

Software applications that can open o files:

Origin (Microsoft Windows)

Free Pascal (Microsoft Windows)

Xcode (Apple macOS / Mac OS X)

Microsoft Visual Studio (Multiplatform)

Edit

Software applications that can edit o files:

Origin (Microsoft Windows)

Free Pascal (Microsoft Windows)

Xcode (Apple macOS / Mac OS X)

Microsoft Visual Studio (Multiplatform)

Save

Software capable of saving o files:

Origin (Microsoft Windows)

Free Pascal (Microsoft Windows)

Xcode (Apple macOS / Mac OS X)

Microsoft Visual Studio (Multiplatform)

Create

Software apps that create o files:

Origin (Microsoft Windows)

Free Pascal (Microsoft Windows)

Xcode (Apple macOS / Mac OS X)

Microsoft Visual Studio (Multiplatform)

Other actions

Software applications that handle other tasks involving o files:

Origin (Microsoft Windows)

Free Pascal (Microsoft Windows)

Microsoft Visual Studio (Multiplatform)

.o (2)

UFO: Enemy Unknown game data

File type category:
Game file

Date updated: February 1, 2017

The o file extension is related to the UFO: Enemy Unknown (also known as X-COM: UFO Defense), a sci-fi turn-based strategic video game for MS-DOS and Amiga.

The o file stores some kind of game data.

There is original version of UFO: Enemy Unknown running on Microsoft Windows via DOSBox available to purchase on Steam distribution service.

Suggested software to open o file:

X-COM: UFO Defense (UFO: Enemy Unknown)

Associated software actions with the o file

Other actions

Software applications that handle other tasks involving o files:

X-COM: UFO Defense (UFO: Enemy Unknown) (Microsoft MS-DOS)