1000 (Sahasra) Names of a deity.
Shiva Sahasranam
http://www.hindupedia.com/en/Shiva_Sahasranamam
Vishnu Sahasranam
http://www.hindupedia.com/en/Vishnu_Sahasranamam
There are also 108 names of a deity, Ashtottarashata namavali, a garland (vali) of names.