Electrostatic Discharge - marking for materials intended to protect other components from ESD by avoiding potential differences.
Crosstip
The crosstip head is one of the most commonly used screw head shapes, characterized by a cross-shaped profile in the middle of the screw head. This type of screw is operated with a crosstip screwdriver (also known as a Phillips screwdriver)
Torx
The Torx head is a screw head shape characterized by a star-shaped, six-pointed profile. This shape is specially designed to provide excellent power transmission and minimize tool slippage (cam-out). Torx screws are operated with a Torx screwdriver or Torx bit.
Slotted
The slotted head, also known as the flat slotted head, is one of the oldest and simplest screw head shapes. It has a single, straight slot on the top of the screw head, which is operated with a flat screwdriver (slotted screwdriver).