Notes about the F77 file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The F77 file type is primarily associated with 'FORTRAN 77 Program'.
Detailed information for file extension F77:
Primary association: FORTRAN 77 Program
Other applications associated with file type F77:
- PDP-10 (FORTRAN-77 Compiler Source)The PDP-10 was a mainframe computer manufactured by Digital Equipment Corporation (DEC) from the late 1960s; the name stands for Programmed Data Processor model 10. The PDP-10 was eventually eclipsed by the VAX supermini machines. The PDP-10 product line cancellation was announced in 1983. Compilers output REL files. Related links: Wikipedia PDP-10 Page
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.