A computer technician’s toolkit may contain a power supply tester, cable testers, a USB network adapter, and a small flashlight. Different types and sizes of screwdrivers, pliers, tweezers, wrenches, and zip ties are also essential. Technicians work with a variety of gadgets. Meanwhile, a technician may use a lint-free soft cloth, cotton swabs, isopropyl alcohol, and an air blowing machine for cleaning computers.