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  2. PPM - Wikipedia

    en.wikipedia.org/wiki/PPM

    Parts-per-million, ppm Carbon dioxide in Earth's atmosphere, CO 2 ppm; Peak programme meter, measuring audio level; Planned Preventative Maintenance of equipment; PPM Star Catalogue of 378,910 stars' positions and proper motions; Proton precession magnetometer, measures small magnetic field variations; Pulse-position modulation of a signal

  3. Devanagari - Wikipedia

    en.wikipedia.org/wiki/Devanagari

    The Devanāgarī script, composed of 48 primary characters, including 14 vowels and 34 consonants, [11] is the fourth most widely adopted writing system in the world, [12] [13] being used for over 120 languages, the most popular of which is Hindi (हिंदी).

  4. List of computing and IT abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_computing_and_IT...

    2NF—second normal form; 3GL—third-generation programming language; 3GPP—3rd Generation Partnership Project – 3G comms; 3GPP2—3rd Generation Partnership Project 2; 3NF—third normal form; 386—Intel 80386 processor; 486—Intel 80486 processor; 4B5BLF—4-bit 5-bit local fiber; 4GL—fourth-generation programming language; 4NF ...

  5. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    At 10 000 ppm the solution is a deep red colour. As the concentration decreases the colour becomes orange, then a vibrant yellow, with the final 1 ppm sample a very pale yellow. In science and engineering , the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities , e.g. mole fraction or ...

  6. Pulse-position modulation - Wikipedia

    en.wikipedia.org/wiki/Pulse-position_modulation

    Pulse-position modulation (PPM) is a form of signal modulation in which M message bits are encoded by transmitting a single pulse in one of possible required time shifts. [ 1 ] [ 2 ] This is repeated every T seconds, such that the transmitted bit rate is M / T {\displaystyle M/T} bits per second.

  7. Peak programme meter - Wikipedia

    en.wikipedia.org/wiki/Peak_programme_meter

    A typical British quasi-PPM. Each division between '1' and '7' is exactly four decibels and '6' is the intended maximum level. A peak programme meter (PPM) is an instrument used in professional audio that indicates the level of an audio signal. Different kinds of PPM fall into broad categories: True peak programme meter. This shows the peak ...

  8. Optical mark recognition - Wikipedia

    en.wikipedia.org/wiki/Optical_mark_recognition

    OMR software is a computer software application that makes OMR possible on a desktop computer by using an Image scanner to process surveys, tests, attendance sheets, checklists, and other plain-paper forms printed on a laser printer. OMR software is used to capture data from OMR sheets.

  9. Comparison of graphics file formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_graphics...

    Exchangeable Image File Format .exif EVA Extended Vector Animation Sharp Corporation.eva application/x-eva EXR: OpenEXR ILM.exr image/exr Used in film effects for 3d rendering and hdr images. Yes [5] FITS: Flexible Image Transport System .fit, .fits Scientific (esp. astronomical) data acquisition FLIC: Autodesk.fli, .flc, .flx, .flh, .flt ...