Index[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [Y] internal IT documentation 2nd maintenance agreements network diagrams procedures vendor contacts interruptions acknowledging interrupters delegation and directing away do it immediately first-hour rule focus and mutual interruption shield overview recording |