A shredder comprising: a shredder mechanism mounted in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling articles to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements so that the cutter elements shred the articles fed therein; a housing in which the shredder mechanism is received, the housing including a top wall and an opening, the opening extending generally parallel and above the cutter elements for enabling the articles to be shredded to be fed into the housing and into the cutter elements (20; an on/off switch electrically coupled to the motor of the shredder mechanism, the switch including a manually engageable portion manually movable by a user's hand between at least (a) an on position wherein the switch enables delivery of electric power to the motor and (b) an off position disabling the delivery of electric power to the motor; a switch lock movable between (a) a locking position wherein the on/off switch is locked in the off position and (b) a releasing position wherein the on/off switch is released for movement from the off position; wherein the switch lock includes a manually engageable portion provided on the exterior of the housing, the manually engageable portion being manually movable by the user's hand to move the switch lock between the locking and releasing portions; wherein the on/off switch includes a manually engageable portion and a switch module mounted to the top wall; wherein the switch module has a movable element that connects to the manually engageable portion of the on/off switch to enable movement of the manually engageable portion of the on/off switch to move the switch module between its states; wherein the top wall further includes a recess in which the manually engageable portion of the switch lock sits; wherein the locking portion 56 is integrally formed as a plastic piece with the manually engageable portion of the switch lock and extends beneath the top wall via an opening formed in the recess. a shredder mechanism mounted in the housing and including an electrically powered motor and cutter elements, the shredder mechanism enabling articles to be shredded to be fed into the cutter elements and the motor being operable to drive the cutter elements so that the cutter elements shred the articles fed therein; a housing in which the shredder mechanism is received, the housing including a top wall and an opening, the opening extending generally parallel and above the cutter elements for enabling the articles to be shredded to be fed into the housing and into the cutter elements (20; an on/off switch electrically coupled to the motor of the shredder mechanism, the switch including a manually engageable portion manually movable by a user's hand between at least (a) an on position wherein the switch enables delivery of electric power to the motor and (b) an off position disabling the delivery of electric power to the motor; a switch lock movable between (a) a locking position wherein the on/off switch is locked in the off position and (b) a releasing position wherein the on/off switch is released for movement from the off position; wherein the switch lock includes a manually engageable portion provided on the exterior of the housing, the manually engageable portion being manually movable by the user's hand to move the switch lock between the locking and releasing portions; wherein the on/off switch includes a manually engageable portion and a switch module mounted to the top wall; wherein the switch module has a movable element that connects to the manually engageable portion of the on/off switch to enable movement of the manually engageable portion of the on/off switch to move the switch module between its states; wherein the top wall further includes a recess in which the manually engageable portion of the switch lock sits; wherein the locking portion 56 is integrally formed as a plastic piece with the manually engageable portion of the switch lock and extends beneath the top wall via an opening formed in the recess.