Exercise open file formats

Exercise for learning about digital file formats used daily and their openness.

Exercise Checksums

Exercise for learning about checksums using MD5summer. Checksums allow checking the integrity of data files. By running a checksum for a data file, a string is created for the file, allowing comparison between different versions of the file to ensure that the data within them is exactly the same. This is useful to check that a transferred or backed-up data file is the same as the original.