upper case
The US spelling is "capitalization" (upper case, or financial basis). The non-US (British-English) spelling is "capitalisation".
1024 MB= 1 GB Mega is always given an upper case M and Byte is always given an upper case B as is Giga.
The term "Hispanic" should be capitalized because it refers to a specific cultural or ethnic group.
It is not necessary to capitalize the word mainland. The sentence is fine with mainland in lower case, while North America is in upper case.
The letters "sp" (either in lower or upper case) can have several different meanings. Sometimes it is used by an editor to note a spelling error. In upper case (SP) it can stand for Shore Police (to the navy), or (to a Scientologist) Suppressive Person.
I am on the estate. Note: the upper-case 'I' should always be used when referring to yourself, not the lower-case 'i'.
upper case
the spelling for pencil case in french is "une trousse".
Artistic license, nothing else. The same stylistic spelling was used on Mercury dimes, among other coins.
It is simply something done by the creator. It is an artistic statement, or so they say.
Both. "Case sensitive" means that upper case and lower case characters are treated as different characters.