This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: translate in Italian language. The original can be viewed here: System boundary.svg: .
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Original upload log
This image is a derivative work of the following images:
2008-01-09T20:40:28Z Stannered 931x818 (4372 Bytes) {{Information |Description=The boundary between a system and its surroundings |Source=[[:en:Image:System-boundary.jpg]] |Date=2008-01-09 |Author=[[:en:User:Wavesmikey]], traced by [[User:Stannered]] |Permission={{PD-user-en|W