yes
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.
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'.
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.
upper case
It is simply something done by the creator. It is an artistic statement, or so they say.
γατάκι and Γατάκι its the same Γ is the upper case of γ.The spelling is γατάκι. It is pronounced gat(a)ki. Enunciate in (a).
Both. "Case sensitive" means that upper case and lower case characters are treated as different characters.