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The story behind @ sign

8 points by alouanchi 9y ago

eesmith 9y ago
The video was too long for the information content. Short version: the "@" symbol has been around for hundreds of years. It has different names in different cultures. It wasn't on early typewriters but by the 1889 it was. In the 1960s it became part of ASCII, and Ray Tomlinson used it as a symbol for routing email to another computer. BTW, they show the "@" on the 4 key. That's the British typewriter layout. The US keyboard had a "$" on that position, and "@" was on the same key as ¢, to the right of ";". (I believe ¢ disappeared in ASCII because it could be composed as 'c' + '/'.)
- enf 9y ago
  The cent sign didn't make it into ASCII because no one ever made a serious proposal to include it, not through conscious exclusion. ASCII-1963 did not have Backspace and therefore did not have character composition. The concept of composing accents appeared in ASCII-1965, by which time ¢ was already gone.
  - eesmith 9y ago
    Then I'm mixing up my 1960s technology. PLATO supported character composition, and APL used it for operators like ⍋ (∆, backspace, ∣), so I assumed that composition using backspace was a reasonably widely understood concept which would have affected ASCII.
    - enf 9y ago
      I don't know why they were slow to embrace backspace. Maybe just because most of the control character that did make it in came from Teletype's requirements, but the Model 33 couldn't backspace so they didn't ask for that one.
skerit 9y ago
I didn't know it was also called "asperand". Seems like some variation of "ampersand"
- eesmith 9y ago
  I had never heard of it either. https://en.wikipedia.org/wiki/At_sign https://en.wikipedia.org/wiki/At_sign > The fact that there is no single word in English for the symbol has prompted some writers to use the French arobase[3] or Spanish and Portuguese arroba, or to coin new words such as asperand,[4] ampersat'[5] and strudel,[6] but none of these has achieved wide usage. That Wikipedia entry start "ampersat", another term I hadn't heard of. There's a lot of discussion on the talk page about the various names and neologisms.

8 points by alouanchi 9y ago

The video was too long for the information content. Short version: the "@" symbol has been around for hundreds of years. It has different names in different cultures. It wasn't on early typewriters but by the 1889 it was. In the 1960s it became part of ASCII, and Ray Tomlinson used it as a symbol for routing email to another computer. BTW, they show the "@" on the 4 key. That's the British typewriter layout. The US keyboard had a "$" on that position, and "@" was on the same key as ¢, to the right of ";". (I believe ¢ disappeared in ASCII because it could be composed as 'c' + '/'.)

enf 9y ago
The cent sign didn't make it into ASCII because no one ever made a serious proposal to include it, not through conscious exclusion. ASCII-1963 did not have Backspace and therefore did not have character composition. The concept of composing accents appeared in ASCII-1965, by which time ¢ was already gone.
- eesmith 9y ago
  Then I'm mixing up my 1960s technology. PLATO supported character composition, and APL used it for operators like ⍋ (∆, backspace, ∣), so I assumed that composition using backspace was a reasonably widely understood concept which would have affected ASCII.
  - enf 9y ago
    I don't know why they were slow to embrace backspace. Maybe just because most of the control character that did make it in came from Teletype's requirements, but the Model 33 couldn't backspace so they didn't ask for that one.

skerit 9y ago

I didn't know it was also called "asperand". Seems like some variation of "ampersand"

eesmith 9y ago
I had never heard of it either. https://en.wikipedia.org/wiki/At_sign https://en.wikipedia.org/wiki/At_sign > The fact that there is no single word in English for the symbol has prompted some writers to use the French arobase[3] or Spanish and Portuguese arroba, or to coin new words such as asperand,[4] ampersat'[5] and strudel,[6] but none of these has achieved wide usage. That Wikipedia entry start "ampersat", another term I hadn't heard of. There's a lot of discussion on the talk page about the various names and neologisms.