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 following are types of DSL transmission technologies: 1  Asymmetrical Digital Subscriber Line (ADSL) â Used primarily by residential customers, such as Internet surfers, who receive a lot of data but do not send much. 2  ADSL typically provides faster speed in the downstream direction than the upstream direction.