If referring to a product like Microsoft Excel, Surf Excel, Hyundai Excel etc. then yes. Otherwise, no unless it is part of a proper noun or at the beginning of a sentence because it is not a proper noun.
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
It should only be capitalized if it forms part of a title.
Yes it should always be capitalized.
Yes it should be capitalized.
As an abbreviation it should be capitalized.
Have should be capitalized if it is the beginning of a sentence. Summer should not be capitalized.
Yes, "Osprey" should be capitalized because it is the proper name of a specific bird species.
Yes, "Local Park" should be capitalized because it is a proper noun.
It should only be capitalized if it forms part of a title.
Yes, it should be capitalized.
Yes it should be capitalized.
As an abbreviation it should be capitalized.
Yes it should always be capitalized.
Yes it should be capitalized.
The first 'c' should be capitalized.
No it should not be capitalized.
Yes, Roman goddess names should be capitalized as they are proper nouns.