EUC is a family of 8-bit profiles of , as opposed to 7-bit profiles such as ISO-2022-JP. As such, only compliant character sets can have EUC forms. Up to four coded character sets (referred to as G0, G1, G2, and G3 or as code sets 0, 1, 2, and 3) can be represented with the EUC scheme. The G0 set is set to an compliant coded character set such as US-ASCII, () or (the lower half of ) and invoked over GL (i.e. 0x21–0x7E, with the most significant bit cleared). If US-ASCII is used, this makes the code an extended ASCII encoding; the most common deviation from US-ASCII is that 0x5C (backslash in US-ASCII) is often used to represent a Yen sign in EUC-JP (see below) and a won sign in EUC-KR.