The document provides biographical and contact information for Sayed Ahmed, the president and chief architect of Justetc Technologies. It lists Sayed Ahmed's educational background and provides multiple addresses and contact details for the Canada and Bangladesh offices of Justetc Technologies. The document also lists several websites operated by Justetc Technologies related to online education and training in English and Bangla.

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 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

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/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 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