In Hungarian, when there's a dot both inside and outside parentheses at the end of a sentence, we write it as follows:

Sok állatom van (kutya, macska stb.).

(Meaning: I've got many animals [dogs, cats, etc.])

I'm not sure though how do we write it in English.

  1. I've got many animals (dogs, cats, etc.).
  2. I've got many animals. (dogs, cats, etc.)
  3. I've got many animals (dogs, cats, etc.)
  4. I've got many animals (dogs, cats, etc).
  • 4
    Etc. is not an acronym, it's an abbreviation. – Alenanno Apr 28 '11 at 9:51
  • @Alenanno: Thanks, I often confuse acronyms with abbreviations. Corrected. – nyuszika7h Apr 28 '11 at 9:56
  • Number 1 in the OP's list is correct, except that plural examples would look more idiomatic: "I've got many animals (dogs, cats, etc.)." – The Raven Apr 28 '11 at 10:46
  • @TheRaven: You're right, fixing it. – nyuszika7h Apr 28 '11 at 11:10

The dot in etc. is the dot for the abbreviation; the solutions are:

  • If the abbreviation is outside of parentheses, you use only one dot, because it serves for both the abbreviation and the sentence-period:

I've got many animals, such as dogs, cats, etc.

I've got many animals: dogs, cats, etc.

  • If it's inside the parentheses, like in this case, then you should use two dots, since one is for the abbreviation, the other is for the sentence:

I've got many animals (dogs, cats, etc.).

  • 2
    how does this answer the OP's question? "Attachment A" does not get a period, so it's not relevant. – tenfour Apr 28 '11 at 10:01
  • You're right. I'm editing it. – Alenanno Apr 28 '11 at 10:07
  • 1
    @Alenanno: Can you provide reference to your answer? This could also help for future lookups regarding similar issues – Dror Sep 4 '13 at 9:04
  • 4
    References include the Languages Portal of Canada and the Chicago Manual of Style – Alicja Z Apr 1 '14 at 21:54
  • 1
    I am not sure if this applies to English (but I feel it may apply), but in French, you can avoid the last period if there's one inside the parenthesis : “etc.)” is acceptable as much as “etc.).”: grammarbook.com/punctuation/parens.asp – avetisk Aug 17 '16 at 19:21

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