Semantic Keys are elements (word-parts) of written language that give an iconic,general representation of the whole word’s meaning. In written Sino-Japanese the “radical”or semantic components play this role. For example, the character meaning 'woman,female’ is the Semantic Key of the character for Ma 'Mama’ (alongside the phonetic component Ma, which means 'horse’ as a separate character). The theory of semantic Keys in both graphic and phonemic aspects is called qTheory or nanosemantics.The most innovative aspect of the present article is the hypothesis that, in languages using alphabetic writing systems, the role of Semantic Key is played by consonants, more specifically the first consonant. Thus, L meaning 'Lif t ’ is the Semantic Key of English L f,Ladle, Lofty, aLps,eLevator,oLympus; Spanish Leva, Lecantarse,aLto,Lengua; Arabic aLLah, and Hebrew? aeL-0aL ‘upto-above’ (the Israeli airline), Polish Lot ‘flight’ (the Polish airline); Hebrew aeL, aeLohim ‘God’, and haLLeluyah ‘praise-ye God’ (using Parallels, 'Lift up God’). Evidence for the universality of the theory is shown by many examples drawn from various languages, including Indo-European Semitic, Chinese and Japanese. The theory reveals hundreds of relationships within and between languages,related and unrelated, that have been “Hiding in Plain Sight”, to mention just one example:the Parallel between Spanish Pan 'bread’ and Mandarin Fan 'rice’.