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.
1 DSL-Digital Subscriber Line-a family of technologies that offers digital data transmission between the local phone company Central Office and the customer. 2  Typically, DSL speeds range between 128 Kbps and 3 Mbps. 3  See ADSL, IDSL and SDSL for some of the different options.