WHAT'S THE MEANING?
While emulators are often confused with simulators, the two are totally different things. Simulators mimic the activity of what it is simulating and are often used for analysis and study purposes. On the other hand, emulators are used as a substitute for the hardware or software it is emulating. For example, if you want to play a PlayStation 2 game on your phone, you can use a PS2 emulator for Android or iOS without making any hardware modifications.
DID YOU KNOW?
Did you know Game Boy emulators are one of the first console emulators to ever exist? The first emulator appeared seven years after the release of the popular 90s gaming console. Marat Fayzullin created the Virtual Game Boy, the first emulator in existence that could play commercial games. His creation became a hit especially to gamers who weren't able to lay their hands on the Game Boy console. Fayzullin also created the iNES, the first emulator for NES. Keep in mind that these were created during the time when computers weren't fast enough to mimic games.
At first, emulation was deemed as a form of piracy. In fact, emulation was even considered as a dirty word in the game development industry. This is because they mimic propriety hardware and uses the game's code to run it on a device without making any modification. Luckily the negative view on emulation changed over time as gamers now see it as a form of preservation. It allows nostalgic players to go back in time and play their favorite childhood games. Now, there are dozens of Gameboy Advanced Emulators as well as emulators for other old gaming consoles. With the many advances in technology, anything is virtually possible —even going back in time.