A gramogram, grammagram, or letteral word is a letter or group of letters which can be pronounced to form one or more words, as in "CU" for "see you". They are a subset of rebuses, and are commonly us
Instant-messaging app ICQ is a gramogram for "I seek you".
CDC? is a children's puzzle book written and illustrated by author and cartoonist William Steig. Originally published in 1984, it is a sequel to his 1968 picture book CDB! and is of the same concept: