Abstract: Alphanumeric keyboard input apparatus has a mount and a plurality of keys on the mount arranged in four V-shaped rows, the four rows nested together, one within the other, so as generally to form a chevron. Alphanumeric indicia on the keys are arranged in QWERTY typing layout. At least two keys have base perimeters forming chevrons, one in a first row of the four rows and one in a second row of the four rows. Four keys of the first plurality have base perimeters forming irregular trapezoids, two in a third row of the four rows and two in a fourth row of the four rows.