X.20, X.200, X.208, X.209, X.20bis, X.21, X.210, X.211, X.212, X.213, X.214, X.215, X.216, X.217, X.218, X.219, X.21bis, X.22, X.220, X.223, X.224, X.225, X.226, X.227, X.228, X.229, X.24, X.244, X.25, X.26 - Acronyms von A bis Z - Wörterbücher