Benzene is a widely used industrial chemical. Benzene is found in crude oil and is a major part of gasoline. Its used to make plastics, resins, synthetic fibers, rubber lubricants, dyes, detergents, drugs and pesticides. Benzene is produced naturally by volcanoes and forest fires. In homes, benzene may be found in glues, adhesives, cleaning products, paint strippers, tobacco smoke and gasoline.
A system call is an interface between a user-space application and a service that the kernel provides. Because the service is provided in the kernel, a direct call cannot be performed; instead, you must use a process of crossing the user-space/kernel boundary.
A call centre or call center is a centralised office used for receiving or transmitting a large volume of requests by telephone. An inbound call centre is operated by a company to administer incoming product support or information inquiries from consumers.Outbound call centers are operated for telemarketing, solicitation of charitable or political donations, debt collection and market research.n virtual call centre model, the call centre's operator pays a monthly or annual fee to a vendor that hosts the call centre telephony equipment in their own data centre. In this model, the operator does not own, operate or host the equipment that the call centre runs on.