HR is an obsolete image format associated with the TRS-80 computer system, produced by Tandy Corporation in the late 1970s. Several models of the TRS-80 microcomputer were sold during the 1980s, particularly in the United States. HR files are currently very rare and compatible with a limited number of image viewers.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple HR files as once.
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