Register CPU
Registers, the processor (CPU) in the special memory (MEMORY), used to store operations and instructions (INSTRUCTION) information. A processor normally has several registers, and some have specific functions, others for general-purpose registers can be used to put data or memory addresses, registers the data width is the number of bits in the processor, such as 32-bit processor registers width is 32 bits.

Registry Windows
WINDOWS system and database used to store system and application settings.

Relation Database
The concept of relational database from IBM in 1970, formally proposed changes from the database management and applications. All information is based on the past, a simple accumulation of the storage manner, the computer can not be an effective information management.
The relational database design is to place all data is stored in tabular form, through the form on the orthogonal (Normalize), according to the data table design efficient processes, reduce data repetition rate, and an audit trail for efficient storage and in the database, to optimize the database structure.
Relational database to enable individuals or businesses to more quickly and easy way to create, acquire or manage large amounts of data, significantly increasing efficiency.

Repeater Network Device
Re-sending device, the signal sent to a network at both ends of replication is mainly used to strengthen the signal so that network cabling can be extended. Generally have to provide effective network cabling length, when the segment is longer than the provisions of this tends to signal attenuation, cause network signal can not be effectively delivered, so in a fixed length of the above need to use complex devices to enhance the signal to send. a simple analog devices will be re-sent signals make a big transmission, digital signals will be re-reading devices to send and re-send. easily confused with similar functions, but the equipment has HUB, BRIDGE, ROUTER.