frag·men·ta·tion 
(frăg′mən-tāshən, -mĕn-)
(frăg′mən-tāshən, -mĕn-)n.
1. The act or process of breaking into fragments.
2. The scattering of the fragments of an exploding bomb or other projectile.
3. Computers The scattering of parts of a file or files throughout a storage device, as when the operating system breaks up the file and fits it into the spaces left vacant by previously deleted files.