Chinese words with non-Chinese letters / characters? Some Chinese words mix Roman letters and Chinese characters. For example:


AA制, meaning to split the bill evenly (or "go dutch" as that's often called in English).
N次方根, meaning "nth root" (i.e., including square roots, cube roots, etc. as special cases).


Are there other examples of Chinese words that mix scripts like this? Some guidance on answering this question:


I'm not particularly interested in words that include arabic numerals alongside Chinese characters. I'm assuming there are a lot of these (and also that they could be written in all Chinese characters if desired).
Slang and technical vocabulary are both fine. If a word has a dictionary entry, an encyclopedia (or subject-specific encyclopedia) page, or if you're pretty sure it has wide usage, I'm perfectly happy upvoting it.
I would be thrilled if anyone found examples that included something other than the Roman letters as used in English (i.e., A-Z). On the other hand, I doubt there are such cases.
There are lots of them, here's what I can recall:

T恤衫，T-shirt

X光片，X ray image

卡拉OK，karaoke

K线图，Candlestick chart

A型血，Blood Type A

P图(v.)，Photoshop an image

维生素C，Vitamin C

O型腿，Blount's diseas

TCP协议，Transmission Control Protocol

RSS源，RSS feed

UI设计，User Interface design

All of the words are widely used, most of them combine the English letter and Chinese so the word is easier to understand. Basically everyone knows the 26 English letters, so only the words are translated to keep things simple.