I had this same question because I wanted to follow the standard if there was any. The obvious choice here is .psv considering the naming system of .csv and .tsv – however, I couldn’t find this in use anywhere. The most common extension that I could find associated with a pipe-delimited file is simply .txt. … Read more
.a is an archive of code: compiled but not linked. You would link statically with it during your program’s final link step. .lib can be either the same as .a, or a magical so-called “import library”: a thin placeholder which causes you to require a .dll at runtime.
According to FileInfo, the file extension is for Java Servlets.
There is usually no difference, as far as page rendering goes. It’s a huge facility developer-side, though, when your web project grows bigger. I make use of both in this fashion: .PHP Page doesn’t contain view-related code .PHTML Page contains little (if any) data logic and the most part of it is presentation-related