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Posts Latest Activity Photos. Page of 2. Filtered by:. Previous 1 2 template Next. October 14, , PM. One thing I immediately noticed is that it uses a slash through the letter O instead of through the number zero. Wikipedia doesn't have much to say: "IBM and a few other early mainframe makers used a convention in which the letter O has a slash and the digit 0 does not.
I thought the DEC terminals might've had some influence, but according to the screenshots I've found, they didn't use the slash; they show the letter O as wider and more squared-off, while the 0 is slightly narrower and has more rounded edges. Same thing with the IBM in Certainly at least by , the "trinity" of Apple, Commodore, and Radio Shack were all using the slashed zero, and in all of the computer books I've read from the late s to present, I've never seen the slash through the letter O -- the only thing close to it is the TRS Pocket Computer made by Sharp , which puts a tick mark on the upper right of the letter O, making it look like an upside-down Q.
Tags: None. Chuck G. The slash-zero isn't computer-related at all. Ask any radio amateur. Comment Post Cancel. I was taught it's a thirteenth century math thing, like putting a dash through Z so you don't mistake it for a 2. The latter really isn't needed on computers, though being able to tell 0 from O is very handy in monospace low pixel density text.
Though I never understood the dash through 7's From time to time the accessibility of a website must be refreshed with the blood of owners and designers. It is its natural manure. Agent Orange. I retired from the Navy in All of the naval messages that I'm accustomed to, up to that time, slashed the zero. Surely not everyone was Kung-Fu fighting. Originally posted by deathshadow View Post. Some forums can only be seen by registered members. View detailed profile Advanced or search site with Search Forums Advanced.
Originally Posted by jcp Because of military and logbook entries we were required to. And a slash through the 7. Well More like a little minus sign and tick marks above and below S to differentiate it from a 5.
I frequently still use those if I'm jotting down a note with an alpha-numeric order number in it. Originally Posted by MillennialUrbanist. I know I do in many cases. I don't do it in formal letters or when whatever I'm writing is all numbers, like a phone number or a price. But in short, casual, alphanumeric writing, like a serial number or an account number, I do it all the time. It lets people distinguish the 0 from the O, especially when the difference is important. It's a habit I acquired in my college's computer science classes, and I almost-permanently solidified it from working in IT.
Today, it's my normal MO at my jobeven my boss got used to itand sometimes have to remind myself not to do that in non-IT circles. When it comes to typed writing, most fonts make a visible distinction between the O letter and the 0 zero : the O is more rounded, and the 0 is more oval. Also, some fonts actually put a slash across the zero, and green-screen computing puts a dot in the middle of the zero. There's also a matter of distinguishing the lowercase L and the 1, or the S and the 5.
But in this thread, let's focus on putting a slash across the 0 to distinguish it from the O. How about everyone else? Do you or do you not? In normal writing, I do not. But I'm an engineer and was a survey party chief.
What I produced was basically a legal document if it needed to be at some point. Yes, I would put a slash through my zeroes. Put a dash on my sevens--basically anything I needed to do to avoid confusion.
When I typed I didn't use courier as an ell l looks exactly like a one 1. In cryptanalysis, it's important to distinguish between "O", "0", "o", "1", "l", "I", " ", etc.
Originally Posted by hunterseat. I slash 0's, 7's and Z's, all because it was required when I was in the Navy and old habits die hard. Originally Posted by Therblig.
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