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In IBM mainframe operating systems, Basic sequential access method ( BSAM) [1] is an access method to read and write datasets sequentially. BSAM is available on OS/360, OS/VS2, MVS, z/OS, and related operating systems. BSAM is used for devices that are naturally sequential, such as punched card readers, punches, line printers, and magnetic tape.
Carrier-sense multiple access. Carrier-sense multiple access ( CSMA) is a medium access control (MAC) protocol in which a node verifies the absence of other traffic before transmitting on a shared transmission medium, such as an electrical bus or a band of the electromagnetic spectrum . Under CSMA, a transmitter uses a carrier-sense mechanism ...
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Access control matrix. In computer science, an access control matrix or access matrix is an abstract, formal security model of protection state in computer systems, that characterizes the rights of each subject with respect to every object in the system. It was first introduced by Butler W. Lampson in 1971. [1]
Zigbee is an IEEE 802.15.4-based specification for a suite of high-level communication protocols used to create personal area networks with small, low-power digital radios, such as for home automation, medical device data collection, and other low-power low-bandwidth needs, designed for small scale projects which need wireless connection.
Secure coding. Secure coding is the practice of developing computer software in such a way that guards against the accidental introduction of security vulnerabilities. Defects, bugs and logic flaws are consistently the primary cause of commonly exploited software vulnerabilities. [1] Through the analysis of thousands of reported vulnerabilities ...
Houston Air Route Traffic Control Center ( ZHU) is located at George Bush Intercontinental Airport at 16600 JFK Boulevard, Houston, Texas, United States 77032. [1] The Houston ARTCC is one of 22 Air Route Traffic Control Centers in the United States. Houston Center is the 9th busiest ARTCC in the United States.
In 2023, Twitter introduced a paywall system that required businesses to pay for access to its platform. The payment scheme's upper limit amounts to an annual fee of up to $2.5 million for top-tier access. With the paywall implementation, public agencies issued numerous alerts about potential interruptions to transit and weather.