In addition, some of the materials used in IQ tests may be totally foreign to certain cultures, thus creating inequalities and biases. It is interesting to note that IQ scores have increased so much over the 20th century that most of today's test takers would be considered 'geniuses' by 1900 standards.
Digital subscriber line (DSL; originally digital subscriber loop) is a family of technologies that are used to transmit digital data over telephone lines.
The variation called ADSL (Asymmetric Digital Subscriber Line) is the form of DSL that will become most familiar to home and small business users. ADSL is called asymmetric because most of its two-way or duplex bandwidth is devoted to the downstream direction, sending data to the user.