In this directory you can find macro for printing UPC-A barcodes. All necessary macros are defined in file upca.tex. File test-upca.tex contains test of macros and demonstration of usage in plain. Macro works in plain and LaTeX and other standard macro packages. Files: upca.tex - definition of macros test-upca.tex .... test and demonstration of usage Jiri Mrkus (Ji\v{r}\'{i} Mrkus) Faculty of Informatics Masaryk University Czech Republic e-mail: mrkus@mail.muni.cz