Changes

While not strictly emulation ''per se'' (hence why [[Wine]] stands for "Wine Is Not an Emulator"), '''compatibility layers''' allow software written for one operating system to run on a different OS, often by translating API and system calls made by an application to their equivalent calls in the host operating system. In theory, this should allow for near-native performance since no processor emulation takes place, but in practice some software such as games will tend to run a bit slower due to other bottlenecks that occur as a result of [[Emulation accuracyAccuracy|replicating the correct behavior]], such as accounting for graphics APIs like Direct3D that aren't supported on non-Microsoft platforms. Additionally, compatibility layers may also use emulation in order to run software built for a different architecture.