The row of a multiple-row button accordion which is in the home key , the row central to the diatonic arrangment of notes on the instrument. On a C/F Club System accordion, the home row is the C row. On a G/C/F International System accordion, C is the home key and the C row is the home row. International System The fingering system used by the Acordeon Conjunto Norteño (Tex-Mex Accordion). It is a diatonic system similar to that used by the harmonica, replicated thrice. The International System is discussed in the Musician's Guide to Acordeon Conjunto Norteño .
"Home row" is a term that refers to the center row of alphabetical letters on a typewriter or computer keyboard. On the most common type of English language keyboard, the QWERTY layout, "a s d f g h j k l ; '" represents the contents of the home row.