Symbology, now there is a big word that us sophisticated consultants just love to bandy around.
But here goes for another Betty Secret, Symbology is just a flash word for a barcode language. For example, if on my holidays I travel to the Tropical Island of Sri Lanka, I will need to speak the local dialect. In the same way that there are different languages such as French, German, English etc so there are different symbologies such as Code 39, GS1-128, EAN13, etc.
You're interested in a barcode tracking system, but you want to know what equipment you are likely to need. As a starting point most businesses I work with use the following:
The number of barcode scanners you require, obviously depends on your business setup and staff. If you work a shift pattern then you may decide to share scanners between shifts(cutting your initial outlay).