What does PEI stand for?

Chichimeca-Jonaz - Language code (ETLW)

Pan-European Institute - University of Essex - United Kingdom (RCD)

Parity Error Interrupt (VLIE)

Patriotic Education, Inc. (EA)

Peine - Chile - Seismograph station code, US Geological Survey - Closed (SEIS)

Penna RE Inv Tr SNI - AMEX symbol

Pennsylvania Real Estate Investment Trust - AMEX symbol (SPSG)

People Effectiveness Index (TIMI)

Pereira - Colombia - Airport symbol (OAG)

Performance Edge, Inc. - Commercial firm

Perrin - NCIC firearms make code (NCIC)

Petrocel Industries, Inc. - Vancouver Stock Exchange symbol

Petroleum Educational Institute (SAUS)

Petroleum Equipment Institute (EA)

Phosphate Excretion Index - Biochemistry (DAVI)

Phosphorous Excretion Index - Medicine (MEDA)

Phosphorus Excretion Index - Biochemistry (DAVI)

Physical Education Instructor (WDAA)

Physical Efficiency Index - Medicine (DMAA)

Planning Executives Institute - Later, PF

Plant Engineering Inspection (AAG)

Plant Engineering Introduction (SAUS)

Playboy Enterprises, Inc.

Pointless Electronic Ignition (SAUS)

Pollution Enterprises, Inc. (EFIS)

Polyetherimide

Polyethylenimine - Organic chemistry

Porcelain Enamel Institute (EA)

Postejaculatory Interval - Physiology

Postexercise Index (RAWO)

Precipitation-Efficiency Index

Preferred Equipment Identifier (VLIE)

Preliminary Engineering Inspection - NASA (KSC)

Preparedness Exercise Issue (SAUS)

Prince Edward Island - Canadian province

Prince Edward Island Provincial Library - UTLAS symbol

Prince Edward Island Reports (Haviland's) - A publication (DLA)

Princeton Environmental Institute (NOAA)

Private Equity Intelligence - Investment

Professional Engineers in Industry

Pupil Evaluation Inventory - Education (EDAC)