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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 [ 4 ] .

3. Watermark - Wikipedia

   en.wikipedia.org/wiki/Watermark

   The resulting watermark is generally much clearer and more detailed than those made by the Dandy Roll process, and as such, Cylinder Mould Watermark Paper is the preferred type of watermarked paper for banknotes, passports, motor vehicle titles, and other documents where it is an important anti-counterfeiting measure.

4. Watermark (data file) - Wikipedia

   en.wikipedia.org/wiki/Watermark_(data_file)

   It is the process of altering the original data file, allowing for the subsequent recovery of embedded auxiliary data referred to as a watermark. A subscriber, with knowledge of the watermark and how it is recovered, can determine (to a certain extent) whether significant changes have occurred within the data file.

5. Digital watermarking - Wikipedia

   en.wikipedia.org/wiki/Digital_watermarking

   A digital watermark is called semi-fragile if it resists benign transformations, but fails detection after malignant transformations. Semi-fragile watermarks commonly are used to detect malignant transformations. A digital watermark is called robust if it resists a designated class of transformations. Robust watermarks may be used in copy ...

6. Watermark (disambiguation) - Wikipedia

   en.wikipedia.org/wiki/Watermark_(disambiguation)

   Audio watermark, techniques for embedding hidden information into audio signals; Watermark (data file), a method for ensuring data integrity which combines aspects of data hashing and digital watermarking; Watermark (data synchronization), directory synchronization related programming terminology; Watermarking attack, an attack on disk ...

7. iStock - Wikipedia

   en.wikipedia.org/wiki/IStock

   The company was founded by Bruce Livingstone in May 2000, as iStockphoto, a free stock imagery website supported by Livingstone's web development firm, Evolvs Media. iStock pioneered the crowd-sourced stock industry and became the original source for user-generated stock photos, vectors and illustrations, and video clips. It began charging ...