Abstract: An alphanumeric keyboard comprises a plurality of key operated switches and a cover frame which covers the switches and has bosses for receiving switch operating rams carried by key buttons having projections which receive the rams and which fit into the bosses. At least one compound key of the keyboard is associated with at least two switches and includes a compound key head which overlies at least two bosses. At least one of the rams of this compound key is so mounted on the compound key head that it can be adjusted relative to the compound key head parallel to the keying direction.