-C programs. Regex has three interfaces: one designed for @sc{gnu}, one
-compatible with @sc{posix} (as specified by @sc{posix}, draft
-1003.2/D11.2), and one compatible with Berkeley @sc{unix}. The
-@sc{posix} interface is not documented here; see the documentation of
-GNU libc, or the POSIX man pages. The Berkeley @sc{unix} interface is
+C programs. Regex has three interfaces: one designed for GNU, one
+compatible with POSIX (as specified by POSIX, draft
+1003.2/D11.2), and one compatible with Berkeley Unix. The
+POSIX interface is not documented here; see the documentation of
+GNU libc, or the POSIX man pages. The Berkeley Unix interface is