Sayed Ahmed
Computer Engineering, BUET
MSc. Computer Science, Canada
President/Chief Architect/Lead Developer
Justetc (Just et cetera)Technologies
http://www.justetc.net
http://sayed.justetc.net
sayed@justetc.net
 Canada Address
 Trudelle Street
 Toronto, Ontario, Canada
 Contact
▪ Sayed Ahmed
▪ sayed@justetc.com
 Bangladesh Address
 Justetc Computers
 Habib Complex (2nd
Floor)
 Shimultuly, Gazipur, Dhaka
 Bangladesh
 Contact
▪ Rafiqul Islam
▪ rafik@justetc.com
▪ 01942747702
2Just Etc Technologies, sayed@justetc.net
 Training and Education in Bangla:
Bangla.SaLearningSchool.com
 Training and Education in English:
www.SaLearningSchool.com
 Training and Education in English:
English.SaLearningSchool.com
 Ask a question and get answers : Ask.JustEtc.net
 Offline IT Training:
University.JustEtc.net
 What is Information Technology
 Concerned with
▪ Collection, dissemination, processing, and storage of
▪ Information esp. with the use of computers
▪ Design, development, implementation, support,
management of
▪ Information Systems – computer based
 Technologies related to data
communications
 Data Communication
 Carry data from one place to another or one
device to another
 Examples
 Telephone
 Mobile
 Internet
 IT + CT = ICT
 IT in a broader term includes both
 IT
 CT
 IT now also refers to ICT
 Computing and Information Systems
 Electronic Data Processing, Artificial Intelligence,
Expert Systems
 Broadcasting
 Radio and Television
 Telecommunications
 Fixed line telephones, mobile phones
 The Internet
 Uses telecommunications infrastructure
 Basic Communication
 Fixed phone, mobile, fax, radio, television
 Basic Information Technology
 Uses basic software and printers
 Used in basic everyday needs
 Advanced Communications
 Email, Internet Browsing, Video Conferencing,
ecommerce, VOIP
 Advanced IT
 Advanced software are used for complex needs
▪ DBMS, Information Systems, Enterprise Resource Planning,
Inventory Management
 Computer
 Central tool
 Radio
 Television
 Internet
 Radio: Sound wave to Electro Magnetic Wave
 FM broad cast: 87.5 to 108.0 MHz
 AM broadcast
 Microwave broadcast
 http://ptolemy.eecs.berkeley.edu/eecs20/sidebars/radio/s
pectrum.gif
 Television
▪ NTSC
▪ PAL
▪ Used in Bangladesh
▪ SECAM
▪ HDTV
 The Internet
 The largest computer network in the world
 Consists of many interconnected network of
▪ Small sizes
▪ Large sizes
 Has more than 100 Crore computers
 Internet History
 ARPANET
▪ 1969: USA military interconnected four university computers
in a network called ARPANET
▪ 1982: TCP/IP got invented. In 1983, ARPANET started to use
TCP/IP protocol
 Expansion of the Internet
 1969 to 1983:
▪ Experimental stage
▪ Slow expansion
▪ Covered 20 countries
▪ Around 200 computers got connected
 80s:
▪ NSFNET was established on 1986
▪ Active research started on the Internet Technologies
▪ ARPANET was closed on 1990, and got named as the Internet
▪ ISPs were created on 1989
▪ So everyone got the opportunity to get connected to the Internet
▪ ISOC (Internet Society) was established on 1992
▪ Now, you can connect to the Internet using cell phones
Thanks
Post your questions
at
http://ask.justetc.net

Information and communication technology

  • 1.
    Sayed Ahmed Computer Engineering,BUET MSc. Computer Science, Canada President/Chief Architect/Lead Developer Justetc (Just et cetera)Technologies http://www.justetc.net http://sayed.justetc.net sayed@justetc.net
  • 2.
     Canada Address Trudelle Street  Toronto, Ontario, Canada  Contact ▪ Sayed Ahmed ▪ sayed@justetc.com  Bangladesh Address  Justetc Computers  Habib Complex (2nd Floor)  Shimultuly, Gazipur, Dhaka  Bangladesh  Contact ▪ Rafiqul Islam ▪ rafik@justetc.com ▪ 01942747702 2Just Etc Technologies, sayed@justetc.net
  • 3.
     Training andEducation in Bangla: Bangla.SaLearningSchool.com  Training and Education in English: www.SaLearningSchool.com  Training and Education in English: English.SaLearningSchool.com  Ask a question and get answers : Ask.JustEtc.net  Offline IT Training: University.JustEtc.net
  • 4.
     What isInformation Technology  Concerned with ▪ Collection, dissemination, processing, and storage of ▪ Information esp. with the use of computers ▪ Design, development, implementation, support, management of ▪ Information Systems – computer based
  • 5.
     Technologies relatedto data communications  Data Communication  Carry data from one place to another or one device to another  Examples  Telephone  Mobile  Internet
  • 6.
     IT +CT = ICT  IT in a broader term includes both  IT  CT  IT now also refers to ICT
  • 7.
     Computing andInformation Systems  Electronic Data Processing, Artificial Intelligence, Expert Systems  Broadcasting  Radio and Television  Telecommunications  Fixed line telephones, mobile phones  The Internet  Uses telecommunications infrastructure
  • 8.
     Basic Communication Fixed phone, mobile, fax, radio, television  Basic Information Technology  Uses basic software and printers  Used in basic everyday needs  Advanced Communications  Email, Internet Browsing, Video Conferencing, ecommerce, VOIP  Advanced IT  Advanced software are used for complex needs ▪ DBMS, Information Systems, Enterprise Resource Planning, Inventory Management
  • 9.
     Computer  Centraltool  Radio  Television  Internet
  • 10.
     Radio: Soundwave to Electro Magnetic Wave  FM broad cast: 87.5 to 108.0 MHz  AM broadcast  Microwave broadcast  http://ptolemy.eecs.berkeley.edu/eecs20/sidebars/radio/s pectrum.gif
  • 11.
     Television ▪ NTSC ▪PAL ▪ Used in Bangladesh ▪ SECAM ▪ HDTV
  • 12.
     The Internet The largest computer network in the world  Consists of many interconnected network of ▪ Small sizes ▪ Large sizes  Has more than 100 Crore computers  Internet History  ARPANET ▪ 1969: USA military interconnected four university computers in a network called ARPANET ▪ 1982: TCP/IP got invented. In 1983, ARPANET started to use TCP/IP protocol
  • 13.
     Expansion ofthe Internet  1969 to 1983: ▪ Experimental stage ▪ Slow expansion ▪ Covered 20 countries ▪ Around 200 computers got connected  80s: ▪ NSFNET was established on 1986 ▪ Active research started on the Internet Technologies ▪ ARPANET was closed on 1990, and got named as the Internet ▪ ISPs were created on 1989 ▪ So everyone got the opportunity to get connected to the Internet ▪ ISOC (Internet Society) was established on 1992 ▪ Now, you can connect to the Internet using cell phones
  • 14.