Quakers 794 Quantum theory 771 Quality of life 699 Quantum field theory 661 Quantum physics 620 Quantum Physics 602 Quality control 591 Quantitative Economics 563 Quantitative research 452 Queer theory 431 Quality of Life Research 341 Queens 303 Quantum optics 243 Qualitative research 212 Quantum computers 193 Quantum Optics 188 Quality of work life 139 Quantum Computing 125 Quaker authors 117 Quantum chemistry 115 Quality of Health Care 110 Qumran community 108 Quotations, English 105 Quantum statistics 93 Qing Dynasty (China) 84 Quality of Life 80 Questioning 79 Quality Assurance, Health Care 78 Qualitative 73 Quantum Gases and Condensates 73 Quacks and quackery 71 Quintets (Clarinet, violins (2), viola, cello) 71 Quantitative 70 Quechua Indians 69 Quotations 64 Quilts 58 Quantum electrodynamics 55 Quarantine 53 Queuing theory 52 Quality 51 Quality assurance 51 Quantum groups 51 Quantum chromodynamics 46 Questions and answers 46 Quotations, maxims, etc 42 Quilting 41 Qaida (Organization) 39 Qin-Han dynasties 39 Quartets (Flute, violin, viola, cello) 39 Quaternions 38 Quality Control 36 Quartets (Unspecified instruments (4)) 34 Quantum gravity 33 Questionnaires 33 Quintets (Piano, clarinet, flute, violin, cello) 33 Quotations, Latin 33 Qualité 32 Quantum communication 32 Quantum computing 32 Queens in literature 32 Quantum electronics 31 Quantum theory -- Congresses 31 Qualitative Research 30 Quartets (Oboe, violin, viola, cello) 29 Quaker women 28 Quantity theory of money 28 Quintets (Piano, violin, viola, cello, double bass) 28 Q hypothesis (Synoptics criticism) 27 Quantum Theory 27 Quintets (Piano, bassoon, clarinet, horn, oboe) 27 Quantum dots 25 Quarries and quarrying 25 Quiché Indians 25 Quietism 25 Quarks 24 Quests (Expeditions) in literature 24 Quadrant 22 Quechua language 22 Quotations, American 22 Quaternary Geologic Period 21 Quests (Expeditions) 21 Quality of products 20 Quantifiers 20 Quantum Information 20 Quotation 20 Quotations in the New Testament 20 Quaker abolitionists 19 Quality Improvement 19 Quantum field theory -- Congresses 19 Quartets (Piano, clarinet, violin, cello) 18 Quantum computers -- Congresses 17 Quietude 17 Quartets (Piano, flute, violin, cello) 16 Queer theology 16 Quiché Indians 16 Quiltmakers 16 Quantum chromodynamics -- Congresses 15 Qualitative theory 14 Quantitative genetics 14 Quantum Communications and Cryptography 14