
HxD is a hex editor, disk editor, and memory editor developed by Maël Hörz for Windows. It can open files larger than 4 GiB and open and edit the raw contents of disk drives, as well as display and edit the memory used by running processes. Among other features, it can calculate various checksums, compare files, or shred files. HxD is distribute...
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http://en.wikipedia.org/wiki/HxD

Hard X-ray Detector, an instrument on the on the Suzaku space telescope
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http://www.translationdirectory.com/glossaries/glossary142.htm
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