@ Mad nightmare
@ grog
I was not refering to solder in general i was refering to the type of tool you use... there are soldering irons and soldering guns. Irons use a principal of resistance to create heat for melting solder while guns use an induction coil to create it. The induction coil can cause electric fields that can damage sensitive digital components (roms, transistors etc.) Soldering irons are the things that look like a pen with interchangeable tips while guns look like a gun with a trigger. While you can get away with using a gun with digital electronics its not recomended.
edit:
The other part you missread is electronics. I stated digital electronics (vs its counter part analog electronics... the is a difference.) Analog circuts are made up of things like ceramic capacitors, resistors, relays, induction coils (transformers etc.) that sort of thing. DIGITAL electronics are circuts that contain semiconductor type components such as integrated circuts (Roms, chips, whatever you call them.) that are more sensitive to electronic fields heat...etc.