Year	Hardware/Software	Applications/Comments
1965	32-128K memory. Most processing on tape	Batch Payroll. One person knows all. One Machine, One Operating System. No application software.
1975	512K memory, 100MB disk drive.	Report Writer Compiler, Marketing Information System, Batch. Most databases are non-relational. Some third party software (table management) used.
1985	PCs with 10MB hard disk. Small LAN. MS-DOS	Interative development of CASE tool. Spreadsheets. Desktops
1995	Many machines, UNIX, AS/400, Mainframe, Windows	ERP, CASE, Relational Databases, Client/Server. Server Room. Multiple teams in different locations.
2000	Big DELL Machines, SQL Server, Windows, Cold Fusion. Large (256MB) memory	Internet Architecture, Yellow Pages Search Application. North Shore Choral Society Website (PHP)
2005	Mainframe, SQL Server, Linux. Larger memory (8GB)	Business Objects - Data Warehouse. Internet mechanics - hosting, domain registration, Open Source, MYSQL
2007	Some independence from hardware and software	AJAX, WEB 2.0, Frameworks, Ruby on Rails, More than one environment per company.