1. ANSI Keyboard: Features a longer left Shift key and no extra key to its right. The Enter key is rectangular and spans the height of a single row.
2. ISO Keyboard: Features a shorter left Shift key, with an additional key usually located to its right (such as “\” or “< >”). The Enter key is shaped like an inverted “L” and spans the height of two rows.
ISO keyboards are primarily found in the European market.
