The Collection List provides information on the completeness and condition of each item. However the letters and numbers are not self explanatory so here is a key to the whole thing. The numbers relating to Visual and Technical Condition are probably different to other peoples systems. I find that you need several categories to give a good idea of the condition, though any system is subjective. The items in faint type are available for Sale or Swap.

Manual

o = original
c = copy
No = I have no manual for this type of chess computer
E = English
G = German
F = French
D = Dutch
S = Spanish
I = Italian
P = Portugese
all = There are two or more parts to the documentation and I have them all

Power Supply

Yes = I have the original power supply
Yes g = I have an appropriate generic or universal power supply
No = I do not have the power supply
B = a Batteries only machine
b = it runs on batteries as well
Integral = the power supply is integral to the machine
Aus = Australian type

Chess Pieces

Yes o = Original pieces with the chess computer
Yes = A set of pieces are with the machine but they are probably or definitely not original.
No = No pieces
n/a = This type of machine does not have pieces with it e.g. those with an LCD chess board
TV = The machine displays on a TV.

Box

Yes = The original box is with the machine.
No = No box
h/c o = Original hard case
s/c o = Original soft case
Case = Optional case from the manufacturer made for this model eg Mephisto BK650 Exclusive Case
Case + ovp = Optional case and original box
all = All of the original boxes
m/c = Mountain Case (purpose built)
w/c = Wood Case
b/c = Brief Case
pouch = Original leather or plastic pouch.

Visual Condition

1+  = As new or exceptional used condition
1   = Mint. Hard to distinguish from new ( though sometimes the boxes will show some shelf wear)
1-  = Close to Mint. Well above average but some minor signs of wear
2+  = Above average (in some peoples terminology this could still be Mint?)
2   = Average used condition. Signs of wear and tear but no bad cracks, bumps or scratches or      anything which detracts markedly from the appearance
2-  = Below average. Perhaps bumps, scratches or light spots
3   = Some important disfiguring feature

Technical Condition

1   = In full and perfect working order
2+  = Close to perfect working order. A minor issue which does not prevent full use and enjoyment of the machine
2   = In working order but a minor function may be inoperative eg sound, non-lighting led or a key may need heavy pressure etc.
2-  = In working order and a full game of chess can be played but at least one function is faulty and this impacts to some extent on use
3+  = Faulty in important respects but still useable
3   = Faulty. Not presently useable but possibly fully mendable
3-  = Faulty. Probably not mendable.
4   = Dead. No prospect of repair.
?  = Unknown. The chess computer is new and unopened.