Genom is a tool for calculating the number of the genes in synteny blocks between two prokaryotic genomes. It uses the table generated by GeneOrder4.01. GeneOrder4.0 is a tool for performing comparative analysis of gene order and synteny in genomes. It presents genome comparisons between two organisms as a table, listing the order of similar genes. Using this table in Excel, we generate such a .csv file which serves as input file for Genom. The application takes those synteny blocks into account where at least two genes are in the same order. It counts these genes and as a result we get the number of genes with the same order between two prokaryotic genomes.