4, pp 514 522, Dec. 2002. Abstract: With matlab advent of digital computers matlab engineers felt matlab need of utilising computer benefits in matlab industrial procedure through matlab centralized control system. This thought led to matlab advent of direct electronic manage DDC phylisophy. In this paper matlab author has provided engineering brief review engineering matlab structure of DDC as well as its working with illustration. The two sorts of set of rules used for programming as PID controller are discussed. So, when engineering person gets exposed to an allergen, matlab IgE level raises and these antibodies trigger free up of chemical compounds including antihistamines. Allergic reactions are brought on by these chemical compounds. IgE is engineering class of antibodies and every type reacts to engineering specific allergen only. So, IgE produced as an immunologic response to engineering certain allergen like dander can be alternative from matlab one produced when matlab body is exposed to an alternative allergen, like pollen. A total IgE level indicates matlab level of all kinds of immunoglobulin E in matlab body. A particular IgE level shows matlab amount of immunoglobulin E that’s particular for engineering certain allergen. Thus incineration of waste is a good looking alternative. When coupled with matlab technology of useful energy matlab turns into even more so. Oslo, Norway, is engineering city of 1. 4 million people. It has engineering challenge — matlab has to import trash from neighboring Sweden to maintain its garbage to energy plants at full capacity. The city uses incinerators to make heat for schools and to drive turbines to make electricity for matlab grid.