A chapter every computer manual should have

The last chapter of my "Gun Direction Computer M15" manual has a section on destroying the computer if it should fall into enemy hands: By Mechanical Means 1) Disconnect the gun direction computer from its source of power. 2) Open the hinged doors on the front and rear of the case. 3) Remove the plug-in units from the cells of the computer main frame. 4) Using an axe, pick mattock, sledge, or other heavy implement, destroy the gun direction computer by smashing the range unit, azimuth and deflection unit, fuze unit, quadrant elevation unit, muzzle velocity unit, spot correction unit, origin, reference, replot unit, main control unit, meteorological unit, H/R unit, amplifiers, terminal boards, and blowers. Elapsed time: 5 minutes. [then run away]