Re: Bracken said Logitech is "riding secular growth trends"
The extra key is actually to the left of Z (pronounced zed, not zee) and gives us \ and |.
US keyboards have a longer left shift key in its place.
The enter key occupies two rows, and the top row part of it occupies the space where \ | is located on US keyboards. The lower row part of it is shorter, and in its place we have # ~, but in that area of the keyboard there are still two keys in total, just arranged differently.
UK Mac keyboards are arranged differently to PC keyboards.
There is an additional key on the numeric keypad if it has one, that gives us an additional = key where / is located. + is one row instead of two, and / * and - are moved right/down one position each.
Also there is a Num Lock key instead of a clear key.
Scroll Lock, Pause and Num Lock are replaced with additional function keys
There are only three keys either side of the space bar instead of 4
Ctrl | Opt | Cmd | Space | Cmd | Opt | Ctrl
Crtl | Fn | Win | Alt | Space | Alt Gr | Win | Context Menu | Ctrl (This is on a Microsoft Surface Keyboard, keyboards from other manufacturers and even some other Microsoft keyboards are different)
There is an Fn key instead of an Insert Key
On the main section of the keyboard, we have § ± instead of ` ¬,
@ and " are swapped,
# is accessed using Option+3 instead of having its own key
€ is Option + 2 instead of Alt-Gr + 4
| \ is replaced with ` ~
# ~ is replaced with \ |
¦ is not available
and Option + pretty much every key will bring up something