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My 6 yr old little cousin, looking at the keyboard asked me what this particular key "Scroll Lock" do.
I had to say, "It would turn the 2nd LED On & Off".
"The Scroll Lock key was meant to lock all scrolling techniques, and is a remnant from the original IBM PC keyboard, though it is not used by most modern-day software. In the original design, Scroll Lock was intended to modify the behavior of the arrow keys."
There's a key, there's a spring & all mechanism, there's print, an LED - But all got no use , & still it comes along, even with the brand new keyboards. Scroll lock is present in all your keyboards? Anywhere there's an use?
Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.
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Ain't no such key on my keyboard, or my wife's.
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Vunic wrote: Scroll lock is present in all your keyboards? Anywhere there's an use?
Yes. It's so you can swear an excel when the arrow keys stop doing what you expect them to. 
Did you ever see history portrayed as an old man with a wise brow and pulseless heart, waging all things in the balance of reason?
Is not rather the genius of history like an eternal, imploring maiden, full of fire, with a burning heart and flaming soul, humanly warm and humanly beautiful?
--Zachris Topelius
Training a telescope on one’s own belly button will only reveal lint. You like that? You go right on staring at it. I prefer looking at galaxies.
-- Sarah Hoyt
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Scroll lock today is used by at least Cakewalk Sonar DAW software to inhibit horizontal scrolling of the wave forms along the timeline as a song plays so you can edit a area of data in that song.
I'm sure there are others.
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The trouble is that keyboards have to be backwards compatible: if there was a key and a LED, then some app which may be important to the user may have used it. The additional cost is trivial compared to the shouts of fury if an app can't be used because it isn't there! 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Vunic wrote: "It would turn the 2nd LED On & Off".
There are Arduino projects and the like that do little more than that. Never underestimate the power to impress of switching on a light! Oh, and on my keyboard it's the third not the 2nd!
I am not a number. I am a ... no, wait!
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On mine, it's the third of four - I have an extra one. Oooo! Shiny....
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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and I suppose your amp goes up to 11 too
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Nah, I'm not greedy. 10.5
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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lol 
Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.
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Yet another excuse not to like excel.
Common sense is admitting there is cause and effect and that you can exert some control over what you understand.
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Dan Neely the pioneer!
Lol thanks for the pointers PC!
Starting to think people post kid pics in their profiles because that was the last time they were cute - Jeremy.
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My whole Keyboard is an LED[^]
Rules for the FOSW ![ ^]
if(this.signature != "")
{
MessageBox.Show("This is my signature: " + Environment.NewLine + signature);
}
else
{
MessageBox.Show("404-Signature not found");
}
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Looks perfect for Space Invaders.
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I do remember there being a way in Turbo C++ for turning on the Num Lock, Caps Lock & Scroll Lock LEDs ahh the fun that could be had by running the Exe and being able to send Morse messagaes...
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It's a great way to get information off of a closed/disconnected system. Install 'virus' that reads data and blinks the keyboard LEDs, then capture the output and convert it back to digital information... 
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I have used the scroll lock key in the not-too-distant past when reviewing logs on an Alpha/VMS system. The fasted way to view the log it to simply send it to the screen, not edit it, especially if the file it still open by an application.
As it scrolls past, I know the patterns I am looking for and will hit scroll lock when I see them to allow me to review the text in detail.
Just because many have no use, doesn't know no one has a use for it.
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I installed AutoHotKey and _all_the_time_ use ScrollLock for running "ProcessExplorer" (from SysInternals). Actually I have 10 more helpful keys, but you asked for ScrollLock - I'm happy we have so "useless" key! )
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Why do they always fall off the boat backwards?
ANS : Because if they fell forwards they would just end up in the boat.
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Why do they called the man with 6 fingers Robert?
Ans: That's his name.
"You'd have to be a floating database guru clad in a white toga and ghandi level of sereneness to fix this goddamn clusterfuck.", BruceN[ ^]
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Now where did you put your jacket??? You'd better bring it, it's cold outside!
Anything that is unrelated to elephants is irrelephant
Anonymous
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The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
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I'd just like a chance to prove that money can't make me happy.
Me, all the time
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The trouble with that joke is that it's pretty much the actual reason! With the weight on their backs the centre of gravity is shifted to the point that it is muscle tearingly difficult to roll forward.
I am not a number. I am a ... no, wait!
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