File Extension O1

.O1 File

File extension: O1
File type: Object File for GO321v1 Platform
Do you have speed issues?
First check your registry for invalid entries.


Notes about the O1 file extension:



Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.

The O1 file type is primarily associated with 'Free Pascal' by FPC Development Team. Free Pascal (aka FPK Pascal) is a 32 or 64 bit (from 1.9.6) pascal compiler. It is available for different processors Intel x86, Amd64/x86 64 (from 1.9.6), PowerPC (from 1.9.2), Sparc (from 1.9.6) and Motorola 680x0 (1.0.x only). The following operating systems are supported Linux, FreeBSD, NetBSD, MacOSX/Darwin, MacOS classic, DOS, Win32, OS/2, BeOS, SunOS (Solaris), QNX and Classic Amiga.

Detailed information for file extension O1:


Primary association: Free Pascal
Company: FPC Development Team

Other applications associated with file type O1:

  • Unknown Apple II File ((found on Golden Orchard Apple II CD Rom))



Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
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Everytime you install and uninstall software you are modifying key system components including your PC registry. This can result in a fragmented registry and invalid entries accumulating over time.

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