System testing is basically a part of software testing and test plan should always contain specific space for this testing. To test the system as a whole, requirements and expectations should be clear and the tester needs to understand real time usage of application too.
The city of Milwaukee, Wisconsin was chosen as the location in which Happy Days was set. Tom Miller, one of the producers, grew up in Milwaukee. In addition, Milwaukee gave the show a midwest flavor that they thought would appeal to a broad-based audience.
(March 2009) Oh Happy Day is a 1967 gospel music arrangement of an 18th-century hymn. Recorded by the Edwin Hawkins Singers, it became an international hit in 1969, reaching No. 4 on the US Singles Chart, No. 1 in France, Germany and the Netherlands and No. 2 on both the UK singles chart and Irish Singles Chart. It has since become a gospel music standard.