Included with giza are PGPLOT interfaces that aim to replicate the full public interface to PGPLOT. This means that giza can be compiled as a drop-in replacement for libpgplot and libcpgplot. So older programs written using PGPLOT can be linked against giza with the source code unchanged, giving a modern plotting library with antialiased lines, real fonts and PDF output. For the c library (libcpgplot) it also avoids the unnecessary linking against FORTRAN necessary with the original libcpgplot so increases portability of code written in c. The giza-PGPLOT API also aims to provide maximum backwards compatibility with PGPLOT (e.g., line styles, greek letter escape sequences, etc.) so that codes can be transitioned with ease.