* Environments different from the real environment:
 - Hard Disk: A file system defers from the real environment by it's discreteness. 
 A Hard disk contains the file system and the reading head. Each bit on the
 file system can be either 0 or 1 (or faulty) and can only be modified by the reading head (i.e.
 no other entities can modify it). We would also like to say it's static, but a bit can go from
 1/0 to faulty without intervention of the reading head.

* Information Environment:

* Non-Determinism when environment is static is possible, indeed. The environment being static does
  not mean that robot operations cannot have more than one result. For example, a robot can exist
  inside a satellite, where it can move on a rail and fix burned circuits. However, an attempt to
  remove a burned circuit board can result in the board getting broken, partly or completely. There
  is no outside interference, so no other entity can interfere the robot's operation, but the lack
  of the derminism of the physical components make this environment non deterministic.