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2. Smallpdf.com - Wikipedia

   en.wikipedia.org/wiki/Smallpdf.com

   Smallpdf is a Swiss online web-based PDF software, founded in 2013. [2] It offers free version with limited features to compress, convert and edit PDF documents. [ 3 ] And its paid version offers advanced features like OCR, compress, and more.

3. K2-18b - Wikipedia

   en.wikipedia.org/wiki/K2-18b

   K2-18 is an M dwarf of the spectral class M3V [4] in the constellation Leo, [5] 38.025 ± 0.079 parsecs (124.02 ± 0.26 ly) away from the Sun. [1] The star is colder and smaller than the Sun, having a temperature of 3,457 K (3,184 °C; 5,763 °F) and a radius 45% of the Sun's, [6] and is not visible to the naked eye. [7]

4. Boltzmann constant - Wikipedia

   en.wikipedia.org/wiki/Boltzmann_constant

   Boltzmann constant: The Boltzmann constant, k, is one of seven fixed constants defining the International System of Units, the SI, with k = 1.380 649 x 10 −23 J K −1.The Boltzmann constant is a proportionality constant between the quantities temperature (with unit kelvin) and energy (with unit joule).

5. Display resolution standards - Wikipedia

   en.wikipedia.org/wiki/Display_resolution_standards

   A common variant on this resolution is also 1360 × 768 (unnamed [123] [1] or named FWXGA [112]), which confers several technical benefits, most significantly a reduction in memory requirements from just over to just under 1 MB per 8-bit channel (1366 × 768 needs 1024.5 KB per channel; 1360 × 768 needs 1020 KB; 1 MB is equal to 1024 KB ...

6. Comparison of file systems - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_file_systems

   File system Stores file owner POSIX file permissions Creation timestamps Last access/ read timestamps Last metadata change timestamps Last archive timestamps Access control lists

7. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, ...