Colorless, odorless Helium is the second most abundant element in the known universe. It has some specific commercial uses, including as a breathing gas for scuba divers, and is used for medical purposes including cooling MRI and NMR machines.
Cylinders are the most common form of delivery for gases. For small quantities or for areas where it is not practical to run piping, cylinders are the mode of choice.
As volumes grow, Liquid cylinders offer the ability to store larger quantities of gas in a smaller footprint.
Before TMG we had six different gas vendors for our various locations and naturally it became confusing at times.