Electromagnetic interference or EMI is any electromagnetic disturbance that interrupts, obstructs, or otherwise degrades or limits the effective performance of electronic or electrical equipment. It can be induced intentionally, as in some forms of electronic warfare, or unintentionally, as a result of spurious emissions and responses, intermodulation[?] products, and the like. It is also known as radio frequencyinterference.
... surprise attack on Port Arthur (Lushun)[?] starts Russo-Japanese War
February 23 - For $10 million the United States gains control of the Panama Canal Zone.
March 3 ...