Open 4th file
Did your computer fail to open 4th file? We explain what 4th files are and recommend software that we know can open your 4th files.
What is 4th file?
Files with 4th extension are used by the Forth programming language as a source code data files.
4th file description
The 4th file extension is associated with the Forth programming language. The .4th file stores source code written in Forth.
Forth is a stack-based, extensible language without type-checking. It is probably best known for its "reverse Polish" (postfix) arithmetic notation, familiar to users of Hewlett-Packard calculators.
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