The distal segment of the hind limb of vertebrates, including the tarsus and foot.

Packetised Elementary Stream

Packetized Elementary Stream A chunk of elementary stream. It often corresponds to a logical boundary of the stream (for instance a picture change), but it is not mandatory. PES carry the synchronization information.

hindfoot

Polyethersulfone

polyether sulfone (an amorphous thermoplastic)

Personal Escort Squad. Also known as Professional Escort Squad / System. These are the Escort Officers, they provide the next layer of protection around the Principal, just beyond that of the BG / IBG. They are primarily tasked with assisting the BG, and specifically with dealing with any threat directly, to facilitate the cover and evacuation of the Principal by the BG.

See potential energy surface.

Potential energy surface. The 3N-6 (or 3N-5, for linear molecules) dimensional function that indicates how the molecule's energy depends upon its geometry. (Not to be confused with experimental photoelectron spectroscopy.)

Pepco Energy Services

see PrinterOn Envoy Server

Provincial Extension Service (Papua New Guinea)

Processed Eucheuma Seaweed (E407a). See SRC.

Public Electricity Supplier. A company that owns and operates the distribution network in its geographical area and had, until April 1998, an exclusive franchise over all customers with a maximum demand under 100kW in the area.

Public Electricity Supplier. Suppliers created by legislation. They have a duty to supply electricity in their area of operation. They also have some obligation (imposed by UK Government) to purchase renewable electricity.

Potential Explosion Site. A location or facility that contains or is expected to contain explosives. Previously known as a source (in waiver requests) or donor (in explosives testing).

A label used by IBM for its CMOS-based mainframes.

See Unsaturated polyester resins.

Professional Examination Services

Personnel Examining Section is the primary testing authority for non-peace officer and promotional (including peace officer classifications) examinations for the California Department of Corrections.

Programmable Electronic System. A system based on a computer connected to sensors and/or actuators in a plant for the purpose of control, protection or monitoring (includes various types of computers, programmable logic controllers, peripherals, interconnect systems, instrument distributed control system controllers, and other associated equipment).

Pharmaceutical Evaluation Section

Pensioner Education Supplement

IEEE's Power Engineering Society

Port Environmental Safety

Public Employment Service.

Public Expenditure Survey

WP Program Editor Work Space File

another name for IDEA