The Byte's

1 KB=1024 Byte
1 MB =1024 KB
1 GB =1024 MB
1 TB =1024 GB
Bit = se defineste ca fiind cantitatea de informatii ce poate fii inregistrata intr-o celula binara

Raster

In the computer graphics, a raster graphic imege or bitmap is a date structure representing a general rectangular of grigs and pixels. A bitmap coresponds bit of bit with a image display on the screen. A bitmap is technically characterized by the width and height of the image in pixels, and the number of bits per pixels.

Raster-based image editors, such as Photoshop,etc revolv around edited pixels.