What is a barcode?

A barcode is a small image of lines (bars) and spaces that is attached to retail store items, identification cards, and mail to identify a specific product number, person, or location. That code uses a sequence of vertical bars and spaces to represent numbers and other characters.

In the world wide web, you can see a large amount of information about the so-called matrix codes, they are also 2D barcodes. What are they and what are they used for?

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2 Ways How to Open the OLM

What is OLM?
Database file with the extension OLM stores binary data about contacts, emails, calendar data, notes, logs, and information from other applications used by Outlook on Apple computers.

OLM files are only used for Mac Outlook and cannot be opened by the Windows version of Outlook, because the Windows version uses PST-files, not OLM.

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How to convert FITS files?

What is the fits-files? How do they differ from all the others?

The FITS (Flexible Image Transport System) format is a standard format used particularly for storing, transferring and processing scientific images from fields such as astronomy. FITS was first launched as an open standard in the early 1980s and has gone through several subsequent upgrades. FITS files contain not just images, but also data related to photometry and spatial calibration, and information about the origin of the image. Similar formats include FIT and FTS.

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