The document provides a history of telecommunications including its roots in telegraph systems in the 19th century and the development of computers and packet switching in the 1950s and 1960s which enabled point-to-point communication between mainframe computers and terminals. It discusses how modern communications satellites use geostationary and other orbits to transmit data and how the World Meteorological Organization established a global network to transmit meteorological data from various sources.
The document provides a brief history of social media from its origins in the 1970s to the present day. It traces the development of early systems like BBS and AOL in the 1970s-1980s followed by the creation of the World Wide Web in 1989. Major early social platforms included GeoCities, SixDegrees, and Friendster in the 1990s-early 2000s. The rise of mainstream platforms like Myspace, Facebook, YouTube, and Twitter in the mid-2000s brought social media into the mainstream. By the 2010s, billions of people worldwide were using social media on a regular basis through various popular platforms.
The history of social networks: how it all beganJailson Lima
?
The history of social networks began in the late 1960s and early 1970s with the development of early online services like CompuServe that allowed users to share information over dial-up connections. In the 1980s, services like America Online and Prodigy expanded access to the internet and allowed users to create virtual profiles. The first recognizable social networks then emerged in the 1990s with sites like GeoCities that let users create personal web pages and connect with others online. By the early 2000s, the rise of sites like Friendster, LinkedIn, and MySpace established the concept of social media that connected personal networks of friends, and in 2004 Facebook launched and grew to dominate the social networking landscape.
The document discusses free computer science eBooks and technology news that are being provided. It includes links to blogs sharing this free content and encourages clicking on advertisements to support their work. It then discusses the topics of wireless technologies and Wi-Fi networks in particular, covering introductions, architectures, elements, how they work, topologies and configurations.
This document provides an overview of computer networks. It defines standalone and networked computer systems, and describes local area networks (LANs) and wide area networks (WANs). LANs connect computers over short distances using technologies like copper wire, fiber optic, or wireless. WANs connect computers across large areas using fiber optic, microwave transmission, or satellite links. The document outlines advantages of networks like sharing hardware and files. It also discusses network security methods involving passwords, encryption, and physical access controls. Finally, it introduces client/server networks, network interface cards, and defines freeware and shareware software.
Wireless Application Protocol (WAP) is a standard for accessing information on the Internet via wireless devices like mobile phones. It uses protocols like WTP, WSP, WML and WTLS to provide an optimized experience for narrowband devices. Some key applications of WAP include banking, email, news, and mobile commerce. While it provides portability and convenience, WAP also faces challenges from small screens and slow speeds.
ÓãÉú (y¨²sh¨¥ng) is a Chaozhou-style raw fish salad symbolizing abundance and prosperity, traditionally served on the seventh day of Chinese New Year. The dish involves a ceremonial tossing called lo hei, which signifies a rise in fortunes, with each ingredient carrying auspicious meanings. Throughout the New Year period, it is common to partake in multiple lo hei sessions, encouraging good fortune and well wishes among participants.
The document discusses network topologies and their characteristics. It describes physical and logical topologies. Common topologies include mesh, star, bus, ring, tree and hybrid configurations. Mesh provides redundancy but is expensive to implement while star is popular for its ease of installation and fault isolation. Bus uses the least cabling but a single break disables the network. Ring passes signals in one direction making it susceptible to breaks. Hybrid combines different topologies to balance advantages and disadvantages. The optimal topology depends on factors like cost, growth and cable requirements.
Project Glass is a Google research project to develop smart glasses featuring a head-mounted display and allowing hands-free access to information via natural language voice commands. The glasses are being developed by Google X Lab and will communicate with mobile phones via WiFi to display notifications and respond to voice commands. Some key features of Google Glass include a small video display, camera, speaker, microphone and touchpad. [/SUMMARY]
Mobile computing allows access to information from any location using portable devices like phones, laptops, and PDAs. It enables users to access data anytime, anywhere, and in any form. While mobile devices have become more powerful over time, challenges remain around limited bandwidth, smaller screens, and battery life. Emerging technologies like 5G networks and improved processors are helping to address these issues and driving innovations in mobile applications. The future of mobile computing is expected to bring many new products taking advantage of continuing advances in technology.
The document discusses social networking and how libraries can use social networking tools. It provides an overview of common social networking sites like MySpace and Facebook. It also discusses how libraries have created pages on these sites and the opportunities and challenges of using social networking to engage patrons and achieve library goals. Examples of specific library social networking pages are given. Reasons both for and against libraries using social networking are explored.
This document discusses and compares different types of transmission media, including guided and unguided media. Guided media includes twisted pair cables, coaxial cables, and optical fiber cables. Unguided media includes radio waves, microwaves, and infrared waves. Each type of media has different characteristics, performance capabilities, and applications. Optical fiber provides the highest bandwidth and data transmission rates, while being immune to interference, but is also the most expensive.
The document provides a history of telecommunications including its roots in telegraph systems in the 19th century and the development of computers and packet switching in the 1950s and 1960s which enabled point-to-point communication between mainframe computers and terminals. It discusses how modern communications satellites use geostationary and other orbits to transmit data and how the World Meteorological Organization established a global network to transmit meteorological data from various sources.
The document provides a brief history of social media from its origins in the 1970s to the present day. It traces the development of early systems like BBS and AOL in the 1970s-1980s followed by the creation of the World Wide Web in 1989. Major early social platforms included GeoCities, SixDegrees, and Friendster in the 1990s-early 2000s. The rise of mainstream platforms like Myspace, Facebook, YouTube, and Twitter in the mid-2000s brought social media into the mainstream. By the 2010s, billions of people worldwide were using social media on a regular basis through various popular platforms.
The history of social networks: how it all beganJailson Lima
?
The history of social networks began in the late 1960s and early 1970s with the development of early online services like CompuServe that allowed users to share information over dial-up connections. In the 1980s, services like America Online and Prodigy expanded access to the internet and allowed users to create virtual profiles. The first recognizable social networks then emerged in the 1990s with sites like GeoCities that let users create personal web pages and connect with others online. By the early 2000s, the rise of sites like Friendster, LinkedIn, and MySpace established the concept of social media that connected personal networks of friends, and in 2004 Facebook launched and grew to dominate the social networking landscape.
The document discusses free computer science eBooks and technology news that are being provided. It includes links to blogs sharing this free content and encourages clicking on advertisements to support their work. It then discusses the topics of wireless technologies and Wi-Fi networks in particular, covering introductions, architectures, elements, how they work, topologies and configurations.
This document provides an overview of computer networks. It defines standalone and networked computer systems, and describes local area networks (LANs) and wide area networks (WANs). LANs connect computers over short distances using technologies like copper wire, fiber optic, or wireless. WANs connect computers across large areas using fiber optic, microwave transmission, or satellite links. The document outlines advantages of networks like sharing hardware and files. It also discusses network security methods involving passwords, encryption, and physical access controls. Finally, it introduces client/server networks, network interface cards, and defines freeware and shareware software.
Wireless Application Protocol (WAP) is a standard for accessing information on the Internet via wireless devices like mobile phones. It uses protocols like WTP, WSP, WML and WTLS to provide an optimized experience for narrowband devices. Some key applications of WAP include banking, email, news, and mobile commerce. While it provides portability and convenience, WAP also faces challenges from small screens and slow speeds.
ÓãÉú (y¨²sh¨¥ng) is a Chaozhou-style raw fish salad symbolizing abundance and prosperity, traditionally served on the seventh day of Chinese New Year. The dish involves a ceremonial tossing called lo hei, which signifies a rise in fortunes, with each ingredient carrying auspicious meanings. Throughout the New Year period, it is common to partake in multiple lo hei sessions, encouraging good fortune and well wishes among participants.
The document discusses network topologies and their characteristics. It describes physical and logical topologies. Common topologies include mesh, star, bus, ring, tree and hybrid configurations. Mesh provides redundancy but is expensive to implement while star is popular for its ease of installation and fault isolation. Bus uses the least cabling but a single break disables the network. Ring passes signals in one direction making it susceptible to breaks. Hybrid combines different topologies to balance advantages and disadvantages. The optimal topology depends on factors like cost, growth and cable requirements.
Project Glass is a Google research project to develop smart glasses featuring a head-mounted display and allowing hands-free access to information via natural language voice commands. The glasses are being developed by Google X Lab and will communicate with mobile phones via WiFi to display notifications and respond to voice commands. Some key features of Google Glass include a small video display, camera, speaker, microphone and touchpad. [/SUMMARY]
Mobile computing allows access to information from any location using portable devices like phones, laptops, and PDAs. It enables users to access data anytime, anywhere, and in any form. While mobile devices have become more powerful over time, challenges remain around limited bandwidth, smaller screens, and battery life. Emerging technologies like 5G networks and improved processors are helping to address these issues and driving innovations in mobile applications. The future of mobile computing is expected to bring many new products taking advantage of continuing advances in technology.
The document discusses social networking and how libraries can use social networking tools. It provides an overview of common social networking sites like MySpace and Facebook. It also discusses how libraries have created pages on these sites and the opportunities and challenges of using social networking to engage patrons and achieve library goals. Examples of specific library social networking pages are given. Reasons both for and against libraries using social networking are explored.
This document discusses and compares different types of transmission media, including guided and unguided media. Guided media includes twisted pair cables, coaxial cables, and optical fiber cables. Unguided media includes radio waves, microwaves, and infrared waves. Each type of media has different characteristics, performance capabilities, and applications. Optical fiber provides the highest bandwidth and data transmission rates, while being immune to interference, but is also the most expensive.
