The plural form of word ‘tooth’ = Teeth.

কী সুন্দর পাখি! 

= How beautiful the bird is!

আয় বুঝে ব্যয় কর। 

= Cut your coat according to your cloth.

Cyber Security

With the rapid spread of information and communication technology worldwide, cyber crime appears to be a potential threat for confidential computer data and systems. Technologically advanced countries like the United States are also victim of this crime. Being a less developed country, Bangladesh is under risk of cyber crimes that threatens the national security of the country. The current government's agenda of making Digital Bangladesh attempts to ensure internet connection in all governmental institutions by 2021. Similarly, both national and multinational companies are now offering online services to consumers that facilitate online shopping, banking, and communication. However, criminals take their way in the digitalized world. They commit criminal activities through phishing, hacking and stealing of personal data. Thus governmental institutions and companies become under security threat for their secret data that can hamper the daily life of the entire population in the country. Moreover, the country's 90 percent of the software is pirated that exacerbates the cyber security in the country. In addition, recent clash between Bangladeshi and Indian hackers influence the diplomatic relations between the two countries. More importantly, terrorist organizations conduct their financial and information transactions through using internet. In this circumstance, the existing acts and initiatives against cyber crime are very limited to combat the threat. The essay attempts to study the threat of cyber crime in the globalized world with an emphasis on Bangladesh. Finally, the article will offer policy options for ensuring cyber security in the country.

ধরি, পুত্রের বয়স = x বছর এবং পিতার বয়স = ৩x বছর

প্রশ্নমতে, ৩x + x = ৮০

$$\begin{gathered} \Rightarrow ৪x = ৮০ \\ \therefore x = \frac{৮০}{৪} = ২০ \end{gathered}$$

∴ পিতার বয়স$= ৩ \times ২০ = ৬০$ বছর।

দেয়া আছে, x + y = 7 এবং xy= 10

∴ (x - y)² = (x + y)² - 4xy

$=7^2 - (4\times 10)$

=49-40

=9

দেয়া আছে, x² + 2xy - 2y - 1

= x + 2xy + y² - y² - 2y - 1

= x² + 2xy + y² - (y² + 2y + 1)

= (x + y)² – (y² + 2xy $\times$ 1 + 1²)

= (x + y) – (y+1)²

= (x + y + y + 1 ) ( x + y - y − 1 )

= (x + 2y + 1) (x - 1) ans.

MICR এর পূর্ণরূপ : Magnetic Ink Character Reader 

URL এর পূর্ণরূপ : Uniform Resource Locator.

ফেসবুক হলো সামাজিক আন্তঃযোগাযোগ ওয়েবসাইট এবং টুইটার হলো সামাজিক আন্তঃযোগাযোগ ব্যবস্থা ও মাইক্রোব্লগিংয়ের একটি ওয়েবসাইট। টুইটারকে ইন্টারনেটের এসএমএস হিসেবে অভিহিত করা হয়।

ফিঙ্গার প্রিন্ট আইডেন্টিফিকেশন Biometrics Technology প্রযুক্তি। 

MS Word এ নতুন Window চালু করার জন্য কীবোর্ড-এর শর্টকাট Key = Ctrl + N ব্যবহৃত হয়।