Serial to USB adapterBecause this is so compact, just throw it into the bag as well. Useful to diagnose devices still using the RS-232 serial port with your USB-only laptop. If you laptop still has a serial port, then perhaps it is time to upgrade your laptop.
Paul Mah is a writer and blogger who lives in Singapore, where he has worked for a number of years in various capacities within the IT industry. Paul enjoys tinkering with tech gadgets, smartphones, and networking devices.