This is the first volume of a two volume set providing detailed cataloging information for the recently published Comparative (dpe bsdur ma) recension of the Tibetan Tripitaka. The catalogue includes cross-references to seven other Kangyur recensions used in the compilation of the Comparative Kangyur, including the previously uncataloged "Litang" (li thang) Kangyur. In addition, errors found in the "tables of contents" (dkar chag) and "cross-reference tables" (re'u mig) to the published edition have been corrected and verified against the published volumes and original blockprints. Indices to Tibetan and Sanskrit titles, translators, and revisers have been added, along with concordance tables aligning catalog numbers between the various recensions. Published by American Institute of Buddhist Studies (AIBS)