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1.
The best console era ever,
the NES dominated all and many great games were created like:

- Super Mario Bros. 1
- Super Mario Bros. 3
- Mega Man 2
- Mega Man 3
- Castlevania 1-3
- Final Fantasy I - III
- Zelda I + II

etc.

At one time, nintendo had to take all NES back because of problems with overheating!
Everyone had an NES in the 80s.

The most popular problem was that the cartridges got dusty and you had to BLOW inside the NES and cartridge to make it work again.

NES roced.
Bari :"The NES changed my life,now I love videogames more than anything"

Renke:"Dude, let me blow into the cartridge, I want to play World Cup Soccer!""
by Bari April 24, 2005
 
2.
Refers to the size of the internal registers of the CPUs used in the early days of personal computers and gaming consoles. It does not refer solely to NES or any single computer. Other examples of 8-bit CPUs included:

TI-99/4 and TI-99/4A
Commodore PET
VIC 20
Commodore 64
Apple
I learned how to code on my TI-99/4a. 8-bit forever!
by ogreesh April 27, 2005
 
3.
8 binary numbers (ie. 10110101, which is equal to the decimal 181) that form 1 bit. During the late 1970's up through the mid-late 1980's, most commercial CPU's could only count 8-bit numbers, ranging from 0-255.

Somehow, people only tend to think of video games when refering to 8-bit things, which it completely innacurate. Many computer systems, as well as video games, were concidered "8-bit."

8-bit processors were eventually replaced by more powerful and faster 16-bit CPU's such as IBM's 8080 line and Motorola's 68000.
Computers: Atari x00 series, Commodore series (PET 16, C-64, C-128, etc.), Apple series, and other similar systems that used the 6502, 6800, or Z-80 processors and their varients.

Game systems: Atari 2600 and 5200, Nintendo Entertainment System (NES), Nintendo's Gameboy, Sega Genesis, Colecovision, etc.
by ataricom April 28, 2005
 
4.
Sub-genre of electronic music; Created from modified 8-bit consoles (NES, Atari, Sega Master System, etc.) and cartridges.
Listening to 8-bit takes me back to the good ol' days when controlers were the least ergonomic part of the game system
by Insane Milkman April 23, 2005
 
5.
-Anything or anyone that is simple and rather uneducated. Used in refrence to the hacking community when a hacker is new to the scene and has very little knowledge of hacking.

-The original Nintendo Entertainment System.
-Any 8 bit hacker could hack his PC.

-Dude 8 bit Nintendo is the way to go.
by DonJuanJohn November 20, 2006
 
6.
8-bit (also spelled as 8-Bit, 8 bit or 8bit) may refer to:

* 8-bit, a historical computer architecture;

o 8-bit game consoles, see History of video game consoles (third generation).

* Octet (computing), a corresponding unit of information, colloquially referred as a byte.

* 8-bit color.

* 8-bit sound;

o 8-bit (music), a style that imitate 8-bit sound.

o 8-Bit, a song by Deadmau5 from his album Get Scraped.

o 8-bit, a group of comedic rappers that use the 8-bit style.

* 8-bit clean, a term in digital communication;

o 8bit, one of MIME encodings – see MIME#Content-Transfer-Encoding;

o 8BITMIME, an option of ESTMP protocol.
An 8bit color picture.
by E.Bless June 15, 2010
 
7.
The number of bits that these classic, popular 1980's video game consoles had:

NES
Sega Master System
Atari 2600
ColecoVision
Sega Game Gear
Anyone who thinks the term "8-bit" only applies to the NES is what you would call a noob.
by Alex Mama April 21, 2005