“Annual of Sofia University “St. Kliment Ohridski” is an open access collection of the newest and some earlier volumes of the emblematic academic series of Sofia University. In the e-catalogue of the University Library all series of the Annuals are analytically catalogued, from the first published volume in 1905 to the present. The bibliographic records have corresponding links following the development of the series. There is a link to the available full-text volumes.