In computing, an emulator is hardware or software that enables one computer system (called the host) to behave like another computer system (called the guest). An emulator typically enables the host system to run software or use peripheral devices designed for the guest system.
i.e. and e.g. are abbreviations of Latin phrases and each has its own specific meaning. i.e. stands for id est, meaning that is.. It is used to explain what exactly something means, or to say the same thing in other words. It is an abbreviation (Latin) of id est. Meaning that is.
for or because of which: there is no reason why he shouldn't come. n, pl whys. (usually plural) the reason, purpose, or cause of something (esp in the phrase the whys and wherefores) interj. an introductory expression of surprise, disagreement, indignation, etc: why, don't be silly!.