(a product) comes out
When
a product starts to be sold, you say that it "came out". Use this to
talk about electronics, books, movies, and so on.
I
remember when the Playstation first came out, it was the most awesome video
game system I had ever seen.
The Lost Season 6 DVD is coming out in a couple
weeks.
After
something "comes out", you can then say that it is out:
Is
the new Will Ferrell movie out yet?
It's
been out for a few weeks.
not to mention (something)
Use
"not to mention ___" when you're listing reasons or excuses. It marks
things that are kind of "extra" items on the list.
For
example, in this sentence:
Smoking
is a nasty habit – bad for your health, expensive, not to mention the odor.
...the
speaker gave two good reasons why smoking is a bad habit: it's bad for your
health and expensive. The bad odor that cigarette smoke leaves is another
reason, but it's not as strong of a reason as the first two. So the speaker
adds that to the list with "not to mention".
The
costs, not to mention the risks, of transporting the telescope to and from
space would have been excessive.
You
can follow "not to mention" with a noun like in the examples above.
You can also follow it with a sentence or clause:
It's
so much easier to order something than to spend all that time going to the
grocery store, cooking, washing dishes. Not to mention I'm not that good of a
cook to begin with.
electronic devices
"Electronic
devices" are machines that use batteries such as laptop computers, phones,
tablets, portable video games, and so on.
You
can also use the word "device" by itself to talk about any machine:
I
saw this device on TV that chops tomatoes perfectly in just a few seconds.
But
more and more, "device" by itself specifically means a mobile phone
or tablet computer:
I
heard that they're releasing a new device at the end of this month.