In the beginning of the year 1969 CE, in the state of
California, people were able to transfer data between two personal computers which were few metres apart via a telephone line, and this was the first such connection to be established anywhere.
Before this incident, such a link was only a concept which was to be implemented in the computer laboratories of the United States Department of Defence as part of their Star Wars program. The aim was to have a network fit for military use.
The number of people who connected to this initial network increased rapidly and developed at a very rapid rate, such that the number has reached more than billion people today, who are connected through millions of personal computers globally, and this, in the opinion of many, was the most important invention of the twentieth century. Allaah Says (what means): “[Allaah] Taught man that which he knew not.” [Quran 68: 5]
Allaah has made mankind a successive authority upon the earth, wherein man lives and worships Allaah; He has granted man great ability of mind and has created for him upon the earth things which he can invest in and utilize in the obedience of Allaah; so glad tidings for the one who utilizes the earth's resources in the obedience of Allaah and woe to those who utilize them in His disobedience.
One cannot help but be surprised when he witnesses the development of the Internet in light of the Hadeeth of the Prophet

which was narrated by Abu Hurayrah

in the book of Imaam Ahmad and others

; he

said:
“The Hour will not come until trials appear in large numbers, lying becomes widespread, markets converge and time shortens.” In another narration, he

said:
“Until time shortens and Harj increases.” So a companion of his asked: “What is Harj?” and he

replied:
“Countless killing.”