Frequently Asked Questions We only have only question so far: Q. What format should I use for my submission? A. There is no mandatory paper format for IWACO submissions. We recommend you use either LNCS (used for ECOOP) or ACM two column (used for OOPSLA). The latter will give you more space, but bear in mind that ten pages in this format is quite a lot for a workshop paper. The accompanying book will almost certainly use the LNCS format, so if you think your paper would be appropriate for publication there, and wish to avoid some reformatting later on, you might want to use LNCS. Papers should be submitted as PDF files.