Update archive-intro.md

docs.it4i/archive/archive-intro.md

 # Introduction
 
-This section contains documentation of decommissioned IT4Innovations' supercomputers.
+This section contains documentation of decommissioned IT4Innovations' supercomputers and services.
 
 ## Salomon
 
@@ -42,4 +42,9 @@ At the end of January 2021, after more than seven years, its operation permanent
 | Corehours used               | 134,130,309        |
 | Power consumption            | 77 kW              |
 
+## PRACE
+
+Partnership for Advanced Computing in Europe aims to facilitate the access to a research infrastructure that enables high-impact scientific discovery and engineering research and development across all disciplines to enhance European competitiveness for the benefit of society. For more information, see the [official website][b].
+
 [a]: https://www.dolnivitkovice.cz/en/science-and-technology-centre/exhibitions/
+[b]: https://prace-ri.eu/