Wednesday, November 12, 2014

Computer: Information Technology (IT) Development History in Nepal

Year Activity 
1971: Introduction of computer for census (IBM1401)

Establishment of Electronic Data Processing Centre. Now merged with the National Computer Centre, for promoting computer usage and computer literacy

First Private Overseas Investment in software development by establishing company for  export, Data Systems International (p) LTD

1985: Distribution of Personal Computers in Nepal

1992: Establishment of Computer Association of Nepal

1996: Establishment of the Ministry of Science, Technology & Environment

1995: Establishment of Mercantile Communications Pvt. Ltd.

1998: Establishment of Nepal Telecommunications Authority (NTA)

2000: Announcement of the first IT policy, “IT Policy 2000”

2001: Establishment of National Information Technology Center

2004: Enactment of Electronics Transaction Act

2004: Telecommunication Policy 2060

2008: Establishment of Government Integrated Data Center

2008: Publication of National Standard Code for Information Interchange.

2010: Promulgation of IT Policy 2010

2012: Establishment of  Department of Information Technology

2014: Disaster Recovery Center  is being constructed in Hetauda 

Monday, May 19, 2014

Computer: What is principle of performance and scalability in Computer Architecture?

Computer Architecture have the good performance of computer system. It is implementing concurrency can enhance the performance. The concept of concurrency can be implemented as parallelism or multiple processors with a computer system. The computer performance is measured by the total time needed to execute application program. Another factor that affects the performance is the speed of memory. That is reason the current technology processor is having their own cache memory. Scalability is required in case of multiprocessor to have good performance.

The scalability means that as the cost of multiprocessor increase, the performance should also increase in proportion. The size access time and speed of memories and buses play a major role in the performance of the system.

Friday, May 9, 2014

Computer: Difference between POP3 and IMAP Mail Server

Since email needs to be downloaded into desktop PC before being displayed, may have the following problems for POP3 access:
  • Need to download all email again when using another desktop PC to check email.
  • May get confused if you need to check email both in the office and at home.
The downloaded email may be deleted from the server depending on the setting of email client.
Since email is kept on server, it would gain the following benefits for IMAP access:
  • No need to download all email when using other desktop PC to check your email.
  • Easier to identify the unread email.
All messages as well as their attachments will be downloaded into desktop PC during the 'check new email' process.A whole message will be downloaded only when it is opened for display from its content.
Mailboxes can only be created on desktop PC. There is only one mailbox (INBOX) exists on the server.Multiple mailboxes can be created on the desktop PC as well as on the server.
Filters can transfer incoming/outgoing messages only to local mailboxes.Filters can transfer incoming/outgoing messages to other mailboxes no matter where the mailboxes locate (on the server or the PC).
Outgoing email is stored only locally on the desktop PC.Outgoing email can be filtered to a mailbox on server for accessibility from other machine.
Messages are deleted on the desktop PC. Comparatively, it is inconvenient to clean up your mailbox on the server.Messages can be deleted directly on the server to make it more convenient to clean up your mailbox on the server.
Messages may be reloaded onto desktop PC several times due to the corruption of system files.The occurrence of reloading messages from the server to PC is much less when compared to POP3.