Please check your grammar: "In general, there are four basic kinds or sizes related to the USB connectors and types of established connection" is not correct. It's either "types of connections" (what it was before your edit and what I reverted to) or (clumsy) "types of an established connection". The rest of your corrections are pretty much the same, mixing up singular and plural:
- "There are two types of pipe" must be plural "pipes"
- "limited by the current number and type of attached USB devices" must be plural "types" because there may be several types and not just one
- "Types of USB connector" – same thing
- You're wrong. Would you say the following?
- There is one type of pipes.
- The type of the objects is "pipe"; there are two [sub]types of pipe. In other words, you are merely supporting a widespread heuristic error. Mfwitten (talk) 17:22, 23 July 2014 (UTC)
- Please check http://english.stackexchange.com/questions/5539/types-of-things-vs-types-of-thing – I won't even bother you with search engine voting (which can be wrong at times) but "types of connector" isn't serious, is it? Have you just a single RS for your claim? Zac67 (talk) 18:39, 23 July 2014 (UTC)