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  2. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  3. Abbrev. Meaning Latin (or Neo-Latin) origin ; a.c. before meals: ante cibum a.d., ad, AD right ear auris dextra a.m., am, AM morning: ante meridiem: nocte every night ...

  4. Tax deduction at source - Wikipedia

    en.wikipedia.org/wiki/Tax_deduction_at_source

    Tax deduction at source. Tax deduction at source (TDS) is an Indian withholding tax that is a means of collecting tax on income, dividends, or asset sales by requiring the payer (or legal intermediary) to deduct tax due before paying the balance to the payee (and the tax to the revenue authority). Under the Indian Income Tax Act of 1961, income ...

  5. Science project - Wikipedia

    en.wikipedia.org/wiki/Science_project

    A science project is an educational activity for students involving experiments or construction of models in one of the science disciplines. Students may present their science project at a science fair, so they may also call it a science fair project. Science projects may be classified into four main types. Science projects are done by students ...

  6. Ultrapure water - Wikipedia

    en.wikipedia.org/wiki/Ultrapure_water

    Ultrapure water (UPW), high-purity water or highly purified water (HPW) is water that has been purified to uncommonly stringent specifications. Ultrapure water is a term commonly used in manufacturing to emphasize the fact that the water is treated to the highest levels of purity for all contaminant types, including: organic and inorganic compounds; dissolved and particulate matter; volatile ...

  7. TDS - Wikipedia

    en.wikipedia.org/wiki/TDS

    Science. Ter die sumendum, a medical abbreviation for 3 times daily. Thermal desorption spectroscopy, to observe molecules desorbed from a surface. Tornado debris signature on weather radar. Total dissolved solids in water. Transderivational search or fuzzy search in psychology.

  8. Project Lead the Way - Wikipedia

    en.wikipedia.org/wiki/Project_Lead_the_Way

    The curriculum is project-based. Three levels of curriculum are used for elementary, middle, and high-school levels. PLTW Launch is the elementary school level, designed for preschool through fifth grade. The curriculum consists of 28 modules (four per grade) that touch on a variety of science and technology topics.

  9. Functional specification - Wikipedia

    en.wikipedia.org/wiki/Functional_specification

    e. A functional specification (also, functional spec, specs, functional specifications document (FSD), functional requirements specification) in systems engineering and software development is a document that specifies the functions that a system or component must perform (often part of a requirements specification) (ISO/IEC/IEEE 24765-2010).

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