Yes they should be capitalized.
"TV" is capitalized because it is an acronym for "television." Acronyms are often capitalized to distinguish them from regular words.
Yes, VCR should be capitalized because it is an acronym for "Video Cassette Recorder".
Nouns that should always be capitalized are the first letter of each word of a proper noun (the name of a person, place, thing, or a title), the first letter of the first word in a sentence, and the letters of acronyms (such as IBM or NASA).
"Can" is typically not capitalized in sentences unless it is the first word or part of a proper noun.
It should be capitalized if it follows or precedes a name.
acronyms
"TV" is capitalized because it is an acronym for "television." Acronyms are often capitalized to distinguish them from regular words.
Yes, VCR should be capitalized because it is an acronym for "Video Cassette Recorder".
Acronyms should always be capitalized (although take care when you pluralize them: the 's' should remain lower case). As to using periods, generally they are not used for acronyms based on initials, such as CEO. Therefore, "CEO" as you have written it in the question is correct.
The words that are not capitalized unless they are the first word in a sentence are common nouns, pronouns (except the first person, subjective 'I'), common adjectives, verbs, adverbs, prepositions, conjunctions, interjections, and determiners. The words that are always capitalized are proper nouns, proper adjectives, and the first person, subjective, personal pronoun 'I', and acronyms.
Nouns that should always be capitalized are the first letter of each word of a proper noun (the name of a person, place, thing, or a title), the first letter of the first word in a sentence, and the letters of acronyms (such as IBM or NASA).
acronyms
There are very many three-letter acronyms in the dictionary, including government agencies (like FDA), titles (like DDS), etc.
Acronyms and their full versions are normally capitalised, so CNA should be capitalised and Certified Nursing Assistant should have each first letter capitalised.
acronyms of sci-tech 1
Use military and civilian acronyms in memorandums, if appropriate.
The acronyms are the short form of a word. The acronyms INTR stands for the interior. There can be other words also but this is the most common for which it is used.