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It provides conventions for printing, numerical values, SI and non-SI units, quantity symbols for multiple engineering domains, and graphical symbol sets for connections, electronic devices, logic, optics, telecom, and flowcharts. Appendices document the standards used and the typefaces for Latin and Greek alphabets.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":46,"@type":70,"position":76},"https://docshare.wps.com/template/paper-templates/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/units-symbols-for-electrical-electronic-engineers-symbols-and-abbreviations-guide/564828/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/units-symbols-for-electrical-electronic-engineers-symbols-and-abbreviations-guide/564828.png","ImageObject",442,249,{"name":88,"@type":89},"Mimi","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-15","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":9},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"What is the purpose of this Units & Symbols reference guide?","Question",{"text":108,"@type":109},"It standardizes how students, staff, and engineering authors use units, symbols, abbreviations, and related conventions in electrical and electronic engineering and related subjects.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"How does the guide handle abbreviations for words and phrases?",{"text":113,"@type":109},"Well-known abbreviations are set using a small roman style with specific exceptions for proper names, the SI unit system, sentence starts, and title/table-heading preferences.",{"name":115,"@type":106,"acceptedAnswer":116},"Which unit systems and related conventions does the guide cover?",{"text":117,"@type":109},"It lists symbols conforming to IEC and BSI recommendations and includes the International System of Units (SI), supplementary and derived units, and conversion factors.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},564828,1792054955,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":45,"category_name":46,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":9,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":135,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":141},2336477974920,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","Units & Symbols  \nfor Electrical & Electronic Engineers  \n[www.](www.theiet.org)[theiet](www.theiet.org)[.org](www.theiet.org)  \nPreface  \nA booklet, Symbols and Abbreviations for use in Electrical and Electronic Engineering Courses, was published by the Institution of Electrical Engineers in 1968 and 1971. To take account of the many revisions and additions to British and International Standards since then, a new and fully revised edition was published in 1979, with reprints in 1980 and 1983.  \nIn 1985, the editorial panel reconvened and undertook a total review and update of the Symbols and Abbreviations booklet, prior to it being re-issued under its new title in the professional brief series, in 1986. Further reviews of the contents were undertaken in 1991 and 1996. Any comments on the present content, or suggestions for additional material, will be welcomed. Please address comments to the Secretary of the Institution.  \nThe booklet is for use by students and staff in colleges and universities, as a reference for authors of papers and books on electrical and electronic engineering and related subjects, and as a guide for draughtsmen and designers in industry.  \nAppendix A lists the standards which have been used in the preparation of this Guide.  \nUnits & Symbols for Electrical & Electronic Engineering © The IET 2016  \n(The Institution of Engineering and Technology is registered as a Charity in England & Wales (no 211014) and Scotland (no SC038698) .  \ni  \nContents  \nIntroduction 1  \n1. Abbreviations for words and phrases 2  \n2. Printing conventions 3  \nLetter symbols, subscripts 3  \n3. Unit symbols 4  \nCompound symbols 4  \n4. Numerical values 5  \nThe decimal sign 5  \nMultiplication of numbers 5  \n5. The International System of Units 6  \nSI base units and supplementary units 6  \nSI derived units 7  \nNon-SI units 7  \n6. Quantity symbols for mechanics, thermodynamics, illumination 8  \n7. Quantity symbols for electrotechnics 10  \n8. Subscripts and other uses of letters and numbers 13  \nGeneral 13  \nSemiconductors 15  \n9. Mathematical symbols 16  \n10. Physical constants 18  \n11. Conversion factors 19  \nLength 19  \nArea, Volume 19  \nMass, Density 19  \nVelocity 19  \nForce, Pressure, Torque 20  \nEnergy, Power 20  \nNucleonics, Radiation etc. 20  \nSpecial remark on Logarithmic quantities and units 20  \n12. Graphical symbols 22  \nConnections and network elements 22  \nPower plant 23  \nElectronic devices 23  \nLogic symbols 24  \nOptic fibre symbols 25  \nTelecommunication symbols 25  \nMicrowave devices 26  \nFlowchart symbols 26  \n13. Some abbreviations 27  \nCommonly used abbreviations in optical, logical and microprocessor circuits 27  \nComponent identification abbreviations 28  \n14. Letter and digit code for R & C values 29  \nUnits & Symbols for Electrical & Electronic Engineering © The IET 2016  \n(The Institution of Engineering and Technology is registered as a Charity in England & Wales (no 211014) and Scotland (no SC038698) .  \nii  \nAppendices  \nA List of Standards used in compilation of ‘Units & Symbols’ 30  \nB Typefaces used: English alphabet, Greek alphabet 31  \nUnits & Symbols for Electrical & Electronic Engineering © The IET 2016  \n(The Institution of Engineering and Technology is registered as a Charity in England & Wales (no 211014) and Scotland (no SC038698) .  \niii  \nIntroduction  \nIn the expression I = 16 mA, I is the quantity symbol for the physical phenomenon of electric current, and 16 is its numerical value in terms of the decimal submultiple (10–3) of a unit (ampere) of current; mA is the unit symbol for milliampere. Other symbols (such as j, exp, Cu) are used to indicate mathematical operations, chemical elements etc. Frequently occurring technical phrases are commonly rendered as abbreviations (such as e. m.f. , p.d. ) . In circuit diagrams, graphical symbols identify network components and devices.  \nInternational letter symbolism is based on the Roman and Greek alphabets. There are fewer than 90 distinctive capital","cbCaigDwiWNxeKwg","https://ap.wps.com/l/cbCaigDwiWNxeKwg","pdf",813000,37,"English","# Introduction\n## Abbreviations for Words and Phrases\n## Printing conventions\n## Unit symbols\n## The International System of Units\n## Quantity symbols\n## Mathematical symbols\n## Physical constants\n## Conversion factors\n## Graphical symbols\n## Some abbreviations\n## Letter and digit code for R & C values\n# Appendices\n## List of Standards used in compilation of Units & Symbols\n## Typefaces used: English alphabet, Greek alphabet","[{\"question\":\"What is the purpose of this Units \\u0026 Symbols reference guide?\",\"answer\":\"It standardizes how students, staff, and engineering authors use units, symbols, abbreviations, and related conventions in electrical and electronic engineering and related subjects.\"},{\"question\":\"How does the guide handle abbreviations for words and phrases?\",\"answer\":\"Well-known abbreviations are set using a small roman style with specific exceptions for proper names, the SI unit system, sentence starts, and title/table-heading preferences.\"},{\"question\":\"Which unit systems and related conventions does the guide cover?\",\"answer\":\"It lists symbols conforming to IEC and BSI recommendations and includes the International System of Units (SI), supplementary and derived units, and conversion factors.\"}]","Units & Symbols - for Electrical - Electronic Engineers - Symbols and Abbreviations Guide | PDF",1791844442,13]