means "thus" or "such" or "so" in Latin

Merriam-Webster says: "intentionally so written"

written after something to indicate that's exactly how the original was written, it's not a typo

One of the many things I was not taught correctly during junior high. Our teacher told us it stood for 'spelling isn't correct', and I remember thinking to myself "uhm...isn't it Latin??"

I've heard people insist it stands for 'spelling intentionally controvertible'.

I tell these people to shove their TLA up their ASS.

A command, given most commonly to a dog (sic 'em, boy!), exhorting the animal/person to attack someone or something.

Sic in this context is actually a corruption of sick, which is in turn a variant of seek.

SIC also stands for Single Instruction Computer, this is a instruction set architecture where the is only one intruction. RISC taken to the most extreme point...

One possible instruction for such a SIC would be SBN : Substract and Branch on Negative.

SBN works the following way : it takes three operands, the first (a) being a pointer, the second (b) being a pointer, and the third (c) being again a pointer. SBN substracts the value pointed by b from the value pointed by a. When the result is non-negative, it will fetch the next instruction, else it will fetch the instruction at c. In c-implementation this gives :

In SIC-ASM :
SBN a,b,c
In c :
*a=*a-*b;
if(a < 0){
  PC=c;
} else {
  PC++;
}

It can be proved that any more useable instruction can be implemented by a sequence of SBNs
For instance, mov A,B could be written as :

SBN A,A,1  //A set to 0
SBN T,T,1  //T set to 0
SBN T,B,1  //T set to -B
SBN A,T,1  //A set to -T which is --B which is B

jmp A could be written as :

SBN 0,1,A  //0-1 < 0 hence will jump to A

Sic (?), a.

Such.

[Scot.]

 

© Webster 1913.

---

Sic (?), adv. [L.]

Thus.

This word is sometimes inserted in a quotation [sic], to call attention to the fact that some remarkable or inaccurate expression, misspelling, or the like, is literally reproduced.

 

© Webster 1913.