FIELD - PARTICLE
A field interacts with any particle that has the quantity it affects. The interaction is defined by the field force formulas. E.g. Define an electric field give it the name Efield then for the force formulas write Fx = 0, Fy = charge*10, Fz = 0 and for the name of the quantity it affects write charge, then the above field affects any particle that has a charge quantity.

PARTICLE - PARTICLE
Any two particles that have a force carrier quantity interact accordingly to the formula of that force, e.g. particle1 and particle2 both have a quantity charge if there is a force defined having charge as its carrier quantity than the two particles interact accordingly to that force.

PHYSIKI always display two windows, CONTROL and WORLD other windows can be created to display various graphs.
CONTROL window.
This window contains the buttons to use for the quick and fast design of the simulation , you can save or load a previous designed simulation, each button is explained below.
LOAD button:
If you select LOAD you will be asked to select or write the name of the file that contains a previous saved simulation.
PARTICLE button:
If you select PARTICLE you can proceed to create edit or delete an particle.
FORCEbutton:
If you select FORCE you can proceed to create edit or delete a force.
FIELD button:
If you select FIELD you can proceed to create edit or delete a field.
GRAPH button:
If you select GRAPH you can proceed to create edit or delete a graph.
ENGINE button:
If you select ENGINE you can select the integration method to be used for the numerical solution of the differential equations describing the simulated system.
LOAD button:If you select LOAD you can load a previous saved simulation.
SAVE button:If you select SAVE you will be asked to write the name of the file in which the current simulation will be saved. This includes all the particles, forces, and viewing information.
EXIT button:
Select EXIT to end the Physics simulator.
CONTROL window.
This window displays the simulation particles moving in three dimensions. There are two sets of buttons one for the time evolution of the simulation and the other for its presentation.
There are two text field displaying values of any graph tha is set to display it's numerical values.
GRAPHwindows.
These windows display graphs.
There are five buttons at the top po each graph window, the
first set's the scales, the second set's the name of a file to store the values of the graph window, the third stops the saving process the forth applies cross bars and the fifth sends the graph values to be displayed on
the world window.