It is using a different computer font. A sea shell pointing to the right is not the same letter as a sea shell pointing down. A common example is the Morse code of dots and dashes presented below. It is really a cipher not a code. Use this invented pattern to decipher the following message.
Computers can communicate through a change in electrical voltage.
This is enciphered mathematically into digital patterns of 0s and 1s which signal switches to be closed or open. For example, each letter of the alphabet could be represented by its position in the alphabet and those positional numbers could be written in base two language of 0's and 1's. The beginning of such a cipher pattern is given below. Finish the pattern for the last half of the alphabet. In the following group of words, column A has five words which have something in common with one another.