When considering moving to a LIS, labs have two choices – buy or subscribe. Buying software usually offers more opportunities for customization, which is usually needed by larger organizations. Subscribing is becoming a popular option for smaller and medium-sized labs – this is called a SaaS LIS model. SaaS simply means Software as a Service. Typically, a lab subscribes for a certain number of users, and can select the different modules needed, but no customization is offered. The burden of maintaining the system, updating it, and meeting HIPAA regulations falls on the software vendor, rather than the lab.