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1.
A joke used by those who are savvy in mathematics. The joke is funny because it makes the point that the person saying the phrase only understands the decimal system, which relies on numbers in groups of 10. The binary system relies on numbers in groups of 2. If the speaker of the phrase had been able to understand binary, he/she would've said the phrase correctly, "there are 2 types of people...".
there are 10 types of people in this world, those who understand binary and those who dont

Decimal:
0,1,2,3,4,5,6,7,8,9,
10,11,12,13,14,15,16,17,18,19,
etc...

Binary:
0,0
0,1
1,0
1,1
etc...
by D Den June 25, 2009
 
2.
A nerd joke, used by those who understand binary against those who don't.
01001110 01100101 01110111 01001110 01100001 01101101 01100101 00100000 01110010 00110000 01111000 00110000 01110010 01110011
yes... ¬_¬
by NewName August 28, 2004
 
3.
A nerd joke. The irony of this is the code 10 is more or less meaningless. the code for two is 00110010 or 011101000111011101101111.
01001001 01110100 00100111 01110011 00100000 01100011 01101111 01101101 01110000 01101100 01100101 01110100 01100101 01101100 01111001 00100000 01110111 01110010 01101111 01101110 01100111 00101100 00100000 01100010 01110101 01110100 00100000 01101001 01110100 00100000 01101100 01101111 01101111 01101011 01110011 00100000 01100011 01101100 01100001 01110011 01110011 01111001 00100000 01101111 01101110 00100000 01110100 00101101 01110011 01101000 01101001 01110010 01110100 01110011. heheh. there are 10 types of people in this world, those who understand binary and those who dont.
by Ronan August 21, 2006