Technology Architecture shows all of the technology components required to support the business applications. They are categorized into hardware versus software with each broken down into sub categories. Among the hardware components are nodes and devices like PCs, workstations, servers, switches, firewalls, disk arrays, etc. The software components include operating systems, integration & middleware software, app servers, DBMS's, and software tools like programming languages. These are linked to the applications and application components that require their presence to operate.