What does the term "iso" mean? Seen in words such as "isotope" and "isopod" et cetera. Thank you :)

Read this excerpt from the employee handbook for pepper's pizza dress code for servers • shoes: servers are required to wear black shoes with non-slip soles. the shoes must be clean, and socks should be black as well. • pants: servers are required to wear black pants that are long enough to touch the top of the shoe. black belts are permitted but not required. • shirts: servers are required to wear a white pepper's pizza t-shirt that is not soiled, stained, or ripped. shirts should be tucked into the pants. each server is provided with five t-shirts • apron: servers are required to wear black aprons that tie at the waist and have pockets. each server is provided with two aprons. appearance servers are required to be clean and well groomed • accessories. no hats, buttons, or scarves are permitted. servers can wear jewelry what is the purpose of the bulleted list in this document? mark this and return save and exit next