Use the letter "I" when referring to oneself or as the subject of a sentence, such as "I am going to the store." It is also used in abbreviations and proper nouns.
Some examples of two-letter country abbreviations include "US" for the United States, "GB" for the United Kingdom, "CA" for Canada, and "JP" for Japan.
Grandmother. That is the proper term, as the others are abbreviations
just a letter "T"
You didn't say for what US state- most have 2 letter abbreviations commonly used by post office. On their website, there is a complete list of all US states
It can be lbs or just the letter p
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A Ph.D. abbreviation can only be used in conjunction with a proper name. This is an example of a correct rule when using abbreviations.
Abbreviations in addresses should be capitalized when they are a part of a proper noun, such as when they represent the name of a street or building (e.g., "123 Main St."). However, if the abbreviation is not part of a proper noun, it should be in lowercase (e.g., "apt. 24").
You can use St or Ste as proper abbreviations for street in the English language.
Is it true Abbreviations of the name of the months and the name of the state are commonly used in business letter headings
Oklahoma City's 3-letter abbreviations is OKC.