Context: Since the late 18th century, Sanskrit has been transliterated using the Latin alphabet. The system most commonly used today is the IAST (International Alphabet of Sanskrit Transliteration), which has been the academic standard since 1888. ASCII-based transliteration schemes have also evolved because of difficulties representing Sanskrit characters in computer systems. These include Harvard-Kyoto and ITRANS, a transliteration scheme that is used widely on the Internet, especially in Usenet and in email, for considerations of speed of entry as well as rendering issues. With the wide availability of Unicode-aware web browsers, IAST has become common online. It is also possible to type using an alphanumeric keyboard and transliterate to Devanagari using software like Mac OS X's international support.

Question: From what time has the Latin alphabet been used to transcribe Sanskrit?
Answer: late 18th century

Question: What transliteration system is most common today?
Answer: IAST

Question: How long has IAST been the standard system used for transliteration of Sanskrit?
Answer: since 1888

Question: What is used in transliteration for computer systems? 
Answer: ASCII

Question: What transliteration scheme is often used on the internet?
Answer: ITRANS

Question: What Greek alphabet has been transliterated since the 18th century?
Answer: Unanswerable

Question: What system was commonly used in the 18th century to transliterate Sanskrit?
Answer: Unanswerable

Question: What academic standard had been used before 1888?
Answer: Unanswerable

Question: What software can only be used on Unicode-aware web browsers?
Answer: Unanswerable

Question: What system of transliteration is not commonly used on the internet or e-mail?
Answer: Unanswerable