Pre-recorded CDs featuring music; medical laboratory research instruments for DNA analysis apparatus; LED signs; downloadable computer software for SCADA (Supervisory Control And Data Acquisition) systems, namely, to monitor and control power generation; gas alarms; electronic control valves, being gas shut-off apparatus; gas masks; gas sensors for measuring concentration; electric gas insulated switchgear; egg-candlers; warning alarms, namely, smoke alarms; calculating machines [ and data pr...