The term "edu" is a shortened form of the word "education." It is often used in domain names or email addresses to identify websites or accounts related to education. For example, a website with the domain name "edu.com" would likely contain educational content or resources. Similarly, an email address ending in "@edu" would suggest that the account belongs to someone associated with an educational institution.

The correct spelling is "persistence".

The phrase "long time no see" is an idiomatic expression that is used to greet someone who you haven't seen or spoken to in a while. It is often used in a lighthearted and friendly manner. The phrase is believed to have originated as a direct translation from a Chinese phrase.