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 (2 nd Floor)  Shimultuly, Gazipur, Dhaka  Bangladesh  Contact ▪ Rafiqul Islam ▪ rafik@justetc.com ▪ 01942747702 2Just Etc Technologies, sayed@justetc.net

3.  Training and Education in Bangla: Bangla.SaLearningSchool.com Training and Education in Bangla: Bangla.SaLearningSchool.com  Training and Education in English: www.SaLearningSchool.com Training and Education in English: www.SaLearningSchool.com  Training and Education in English: English.SaLearningSchool.com Training and Education in English: English.SaLearningSchool.com  Ask a question and get answers : Ask.JustEtc.net Ask a question and get answers : Ask.JustEtc.net  Offline IT Training: Offline IT Training: University.JustEtc.net

4.  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

5.  Technologies related to 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 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

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  Central tool  Radio  Television  Internet

10.  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/rad io/spectrum.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 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

14. Thanks Post your questions at http://ask.justetc.net