Types of physical situations or occurrences: It is important to understand the spectrum of threats to information systems so that responsible administrators can make sure that anticipation measures are widespread.The three types of physical situations or occurrences that can constitute a threat to information systems within an enterprise are: 1. Environmental threats: Natural disasters are the source of a wide range of environmental threats to the information processing facilities. It is possible to evaluate the risk of different types of natural disasters and take suitable precautions so that catastrophic loss from natural disaster is prevented. 2. Technical threats: These threats include electrical power, electromagnetic interference. Electrical power is important for the operation of information system. All the electrical and electronic devices require power without interuptions. Power utility problems like low voltage, high voltage and noise may occur. Example: Most of the computers are designed to withstand long-drawn-out voltage reductions of about 20% without shutting down and without operational error. Therefore no damage occurs but service is interrupted. 3. Human caused threats: The human-caused threats are unauthorized physical access, theft, destruction of equipment or data, mis-use of the resources. These threats are difficult to handle compared to environmental and technical threats. The human caused threats are less predictable than other types of physical threats. Solution Types of physical situations or occurrences: It is important to understand the spectrum of threats to information systems so that responsible administrators can make sure that anticipation measures are widespread.The three types of physical situations or occurrences that can constitute a threat to information systems within an enterprise are: 1. Environmental threats: Natural disasters are the source of a wide range of environmental threats to the information processing facilities. It is possible to evaluate the risk of different types of natural disasters and take suitable precautions so that catastrophic loss from natural disaster is prevented. 2. Technical threats: These threats include electrical power, electromagnetic interference. Electrical power is important for the operation of information system. All the electrical and electronic devices require power without interuptions. Power utility problems like low voltage, high voltage and noise may occur. Example: Most of the computers are designed to withstand long-drawn-out voltage reductions of about 20% without shutting down and without operational error. Therefore no damage occurs but service is interrupted. 3. Human caused threats: The human-caused threats are unauthorized physical access, theft, destruction of equipment or data, mis-use of the resources. These threats are difficult to handle compared to environmental and technical threats. The human caused threats are less predictable than other type.