BidVertiser

-









Comments

Post a Comment

Popular posts from this blog

Introduction to satellite communications

-
Image
HISTORY OF SATELLITE COMMUNICATIONS The first artificial satellite was placed in orbit by the Russians in 1957. That satellite, called Sputnik, signaled the beginning of an era. The United States, who was behind the Russians, made an all-out effort to catch up, and launched Score in 1958. That was the first satellite with the primary purpose of communications. The first regular satellite communications service was used by the Navy in 1960. The moon was used to bounce teletypewriter signals between Hawaii and Washington, D.C. During the early 1960s, the Navy used the moon as a medium for passing messages between ships at sea and shore stations. This method of communications proved reliable when other methods failed. Military satellite communications technology was at a low level until 1965. At that time high quality voice transmissions were conducted between a satellite and two earth stations. That was the stepping stone to the Initial Defense Communications Satellite Program (IDCSP), w...
Read more

Protection of Computer fromVirus

-
Image
http://www.f-secure.com/download-purchase/tools.shtml ANTIVIRUS SOFTWARE LIST eScan AntiVirus ArcaVir by arcabit.com avast! Avira AVG Anti-Virus BitDefender BullGuard CA Anti-Virus Cisco Security Agent Dr.Web DriveSentry (antivirus, antispyware and HIPS technologies) eSafe Fortinet FortiClient End Point Security F-PROT F-Secure G DATA AntiVirus IKARUS antivirus INCA Internet Kaspersky Anti-Virus LinuxShield McAfee VirusScan Mks vir NOD32 Norman ASA Norton AntiVirus Panda Security PC Tools AntiVirus Rising AntiVirus Sophos Anti-Virus Trend Micro Internet Security TrustPort Antivirus -AEC Vba32 AntiVirus Virus Chaser Windows Live OneCare ZoneAlarm
Read more