Abstract
The standard catalogue of variable stars (Kukarkin et al., 1969, 1971, 1974, 1976) recognizes several categories of novae: supernovae (SN), classical novae (N), subdivided where the observations warrant into fast novae (Na), slow novae (Nb), very slow novae (Nc), recurrent novae (Nr), nova-like variables (NZ,), and dwarf novae, including U Geminorum stars (UG) and Z Camelopardalis stars (Z Cam). We exclude supernovae from the present discussion, and summarize the content and interrelationships of the other classes.
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