UPI means the unified payments interface which is an instant payment mechanism, developed by NPCI;
SPID is the number that identifies a service provider to the relevant NPAC. The SPID may be a state-specific number. "Serving Wire Center" denotes the CenturyLink building from which dial tone for local Exchange Service would normally be provided to a particular End User Customer premises. "Signaling System 7" or "SS7" is an out-of-band signaling protocol consisting of four basic sub- protocols:
PID means photo ionization detector.
Contract Manufacturer means a company that produces goods under contract for another company under the label or brand name of that company.
Product Manufacturer means the entity that assembles the component parts to manufacture the final Product;