ISO 25178: Geometric Product Specifications (GPS) – Surface texture: areal is an International Organisation for Standardisation collection of international standards relating to the analysis of 3D areal surface texture.

It is the first international standard taking into account the specification and measurement of 3D surface texture. In particular, the standard defines 3D surface texture parameters and the associated specification operators. It also describes the applicable measurement technologies, calibration methods, together with the physical calibration standards and calibration software that are required.

A major new feature incorporated into the standard is coverage of non-contact measurement methods, already commonly used by industry, but up until now lacking a standard to support quality audits within the framework of ISO 9000. For the first time, the standard brings 3D surface metrology methods into the official domain, following 2D profilometric methods that have been subject to standards for over 30 years. The same thing applies to measurement technologies that are not restricted to contact measurement (with a diamond point stylus), but can also be optical, such as chromatic confocal gauges and interferometric microscopes.

Kaija Kokkola (born 10 September 1962, in Helsinki, Finland), better known by her stage name Kaija Koo, is a Finnish singer.

Kaija began her career when she was 17 years old, as a member of a band Steel City, later known as Kaija Koo Band, until it broke down and Kaija Koo became a soloist. Her debut solo album Kun savukkeet on loppuneet was released in 1986. The next album Tuulten viemää, created with her then-husband Markku Impiö, released in 1993, was Kaija Koo's major breakthrough. It sold 175 000 copies, making it the sixth-best selling album of all times in Finland. Kaija has also participated in the Finnish qualification of Eurovision Song Contest 1981 as a member of the background choir in Frederik's song "Titanic".

Since her breakthrough, she has been very active and still successful, releasing a new album every few years. The lyrics were written by Kaija and Markku together and songs are composed by Markku. However, they divorced in 2006. During her career, Kaija Koo has sold over 520,000 certified records, which makes her the 18th-best-selling music artist, the 10th-best-selling soloist and the third-best-selling female soloist in Finland. In June 2010, she signed out of Cosmos Music Group and started under Päijät-Hämeen Sorto ja Riisto ("Päijänne Tavastian Oppression and Exploitation"), an independent label established in September 2009 by the members of the Finnish rock band Apulanta. In 2010, she released the number-one single "Vapaa", which belongs to the album Irti, released shortly after. Irti has thus far peaked at number two on the Finnish Albums Chart.