The author analyses phonological terminology used in two orthographic manuals written by Adolf Bratoljub Klaic (Koriensko pisanje written in 1942 and Hrvatski pravopis written in 1944 with Franjo Cipra). His terminology is compared with the terminology used in orthographic manuals which preceded Klaic's manual (Boranic 1941; Cipra, Guberina and Krstic 1941, reprint 1998) as well as with the terminology used in modern Croatian orthographic manuals (Babic, Finka, Mogus 1971; Anic, Silic 1986; Babic, Finka, Mogus 1996; Anic, Silic 2001; Badurina, Markovic, Micanovic 2007; Babic, Mogus 2010; Jozic, Zeljko (ed.) 2013). Special focus is on the problems of sound change terminology. The author lists all sound changes mentioned in Klaic's manuals, analyses the terms used to denote them as well as their definitions. Adapted from the source document