1. Synergies core competencies and network based strategies
The firm is organized financially as a collection of strategic business units and the returns to the firm are directly tied to the performance of all the strategic business units . information system can improve the overall performance of these business units promoting synergies and core competencies .

2. Synergies
The idea of synergies is that when the output of some units can be used as inputs to others units , or two organization pool markets and expertise these relationships lower costs and generate profits

3. Core competencies
A core competencies is an activity for which a firm is a word –class leader …. IN GENERAL ..a core competency relies on knowledge that is gained over many years of experience and a first –class research organization or simply key people who follow the literature and stay abreast of new external knowledge

4. Network – based strategies
The availability of internet and networking technology have inspired strategies that take advantages of firms abilities to create networks or network with each others . network-based strategies include the use of network economics ,a virtual company model and business ecosystem.

5. Sustaining competitive advantage
the competitive advantage strategies systems confer do not necessarily last long enough to ensure long-term profitability because competitors can retaliate and copy strategies system ,competitive advantages is not always sustainable markets customer expectations and technology change globalization has made these change even more rapid and unpredictable the internet can make competitive advantage disappear very quickly because virtually all companies can use this technology

6. improving decision making : using a database to clarify business strategy.
software skills :database querying and reporting database design .
business skills : reservation systems ; customer analysis