Glossary

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RF

Radio Frequency. Defines rate of electromagnetic frequencies, on which in one way or another information signal is modulated.

RFID

Radio Frequency Identification. RFID is a method of automatic identification, and also a technology of storing information about an object and data updating on a device called RFID tag or transponder by means of radio frequency electromagnetic emission.

RFID tag can store any digital information about an object (its weight, price, location, characteristics, etc). RFID tag can be attached to any object, animal or person for transmitting or receiving information by means of radio waves. Its main advantages – contact-free and all-weather operation. RFID-system consists of three components: 1. Reader 2. Antenna 3. Tag with built-in antenna, receiver and transmitter.

RISC

Reduced Instruction-Set Computer. Typical features of processors with RISC architecture: fixed length of machine instructions (for example 32 bits) and simple command format; one instruction performs only one memory operation – read or write. “Read-modify-write” operations are missing; big quantity of general purpose registers (32 and more).

Processor design techniques that put the following method on the top: more compact and simple instructions are executed faster. Simple architecture in its turn allows a reduction in the processor’s price so increasing clock frequency. Many previous RISC-processors did not even have multiplication and division commands.

RP

Rapid Prototyping. Technologies used for quick creating of samples or working models of case elements for demonstration or model adjustment before serial production.

RTC

Real Time Clock

RTOS

Real-Time Operating System. The following is characteristic of such operating systems: secured response time on external events (interruptions from equipment); hard subsystem of process planning (high-priority tasks should not be replaced by low-priority ones, with some exceptions); advanced requirements to response time on external events or responsiveness (delayed call of interrupt handler not more than dozen of microseconds, delay in task switching not more than hundred of microseconds).

Ruby

Ruby is an interpreted, reflective, dynamic, object-oriented programming language used for server scripting, prototyping and solving usual programming tasks.

Its main advantages are simple syntax, dynamic loading and high portability.

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