alt Hacker NewsIt's the | symbol.
On later generations of IBM terminal keyboard, you'll see | on the shift-1 position, and a separate key with the broken-bar (¦) symbol. For example, on this keyboard, the broken bar is below the backspace key along with the \ character. https://sharktastica.co.uk/image?id=qhTU8QvD
The reason for the two different types of bar/pipe characters, and why the original IBM PC keyboards only had the broken bar on the keyboard, involves a particularly arcane footnote of history relating to supporting the PL/I language on ASCII terminals: https://www.os2museum.com/wp/a-wunderbar-story/
I had never come across the broken bar before. I feel sorry for those that had to suffer these keys. The keyboard keys themselves look like they have about a mile of travel which was probably exhausting as well. I learned to type on clackity clackity arm typewriters, and those keys were I assumed designed by a masochist. These look even worse