Bee Sting
Anyone who remembers Thick Ethernet will no doubt remember the pain and agony of bee stings, which could only be inserted at a minimum of 2.5 metre intervals to tap the network signal (cables were marked with the minimum insertion points). Our biggest client at the time had a server room with three or four servers in it... and a bloody great coil of thick ethernet cable to go with them. (Thick Ethernet cable was a lot less flexible than parallel printer cables, and about as thick).