An analysis of elements of a company's product mix to determine the opti-mum allocation of its resources is what best defines Portfolio analysis. It is the study of each of a company’s product in an attempt to improve market performance. It is a method of categorizing a firm's products according to their relative competitive position and business growth rate in order to lay the foundations for sound strategic planning. Portfolio consists of a number of different types of assets, such as stocks, bonds and future contracts, is ex-amined for strengths and weaknesses. This process varies depending on who is conducting the analysis, but it has a number of advantages for the in-vestors. Two most common measures used in a portfolio analysis are market growth rate and relative market share. The benefits of product portfolio includes pointing out growths in the mar-ket and improvements made; analyzing failures and success; setting goals and targets, as well as sales strategies; and looking for lapses in profit which could possibly be closed. However, it is not without limitations.
MOBILE PHONES: history, overview and introduction
A mobile phone is an electronic telecommunications device, often referred to as a cellular phone or cell phone. The decreasing cost and the increasing benefits of mobile phones are making it more useful, reliable and easy to ac-cess. A mobile phone allows calls into the public switched telephone system over a radio link. Early mobile phones were usually bulky and permanently installed in vehicles; they provided limited service because only a few frequencies were available for a geographic area. Modern cellular "cell" phones or hand phones make use of the cellular network concept, where frequencies are re-used repeatedly within a city area, allowing many more users to share access to the radio bandwidth. A mobile phone allows calls to be placed over a wide geographic area; generally the user is a subscriber to the phone service and does not own the station. By contrast, a cordless telephone is used only within the range of a single, private base station. A mobile phone can make and receive telephone calls to and from the public telephone network which includes other mobiles and fixed-line phones across the world. It does this by connecting to a cellular network provided by a mo-bile network operator. In addition to telephony, modern mobile phones also support a wide variety of other services such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Blue-tooth), business applications, gaming and photography. Mobile phones that offer these more general computing capabilities are referred to as “Smart phones”.
The first hand-held mobile phone was demonstrated by Dr Martin Cooper of Motorola in 1973, using a handset weighing around 1 kg.
In 1983, the “DynaTAC 8000x” was the first to be commercially available. In the twenty years [from 1990 to 2010], worldwide mobile phone subscrip-tions grew from 12.4 million to over 4.6 billion, penetrating the developing economies and reaching the bottom of the economic pyramid. The basic concept of cellular phones began in 1947, when researchers looked at crude mobile (car) phones and realized that by using small cells (range of service area) with frequency reuse they could increase the traffic capacity of mobile phones substantially. However at that time, the technology to do so was nonexistent.
Composition of Mobile phones
Cell phones are made up of several different materials, the main ones being plastic and lead. The battery is the most dangerous part of the phone to the earth's atmosphere. Plastic makes up most of what a cell phone is. There is also trace amounts of lead in the coating and a rare mineral called tantalum which is found in the capacitors. A little copper some nickel and various oth-er things are found mostly in the battery. The electronic part of a...