What does it mean in English?

When we say it, it can have many different meanings. First of all, "it" is a pronoun, which can be used to replace a noun or thing. For example, "This is my computer, and it works well." Here "it" replaces the computer.

Secondly, "it" can also be used to indicate time or weather conditions. For example, "It's hot today" or "It's two o'clock in the morning." In these cases, "it" is equivalent to "weather" or "time"

"IT" (capital letters) is the abbreviation of "information technology". This word is usually used to describe technologies and industries related to computers and the Internet. For example, "I work in an IT company." Or "My major is IT management."

Generally speaking, the word "it" is widely used in English, and its meaning needs to be understood according to the specific context. And "IT" is usually used to describe technologies and industries related to computers and the Internet.