Stockholm Metro in the context of "Yellow line (Stockholm Metro)"

Storstockholms Lokaltrafik known as SL, (lit. 'Greater Stockholm Local Transport') is the public transport organisation responsible for managing land-based public transport in Stockholm County, Sweden. SL oversees a network that includes the Tunnelbana metro, Pendeltåg commuter trains, buses, trams, local rail, and some ferry services.

SL's network serves approximately 700,000 daily passengers and is financed through a combination of regional taxes and fare revenues. The organisation operates under a unified ticketing system, and contracts with several private operators to run its services, including Transdev, SJ, VR Sverige, Keolis, and Stockholms Spårvägar.

The Green Line (Swedish: Gröna linjen) is the oldest of the three Stockholm Metro lines. The 41.256-kilometre (25.635 mi) long line comprises a single double-tracked line north of the city centre, splitting into three branches south of the city centre. The first section of the line opened as a metro in 1950, making it the first and oldest metro line in the Nordic countries, although some parts of the line date back to the 1930s and were originally used by the Stockholm tramway.

The Red line (Swedish: Röda linjen; officially Metro 2, but called Tub 2 ("Tube 2") internally), is one of the three Stockholm Metro lines. It has a total of 36 stations, of which four are cut and cover, 16 are tunneled, and 15 are on the surface. The line is a total of 41.238 kilometres (25.624 mi) long. It consists of four branches with terminals in Fruängen and Norsborg in the southwest and Mörby centrum and Ropsten in the northeast.

The "Red line" designation began in the late-1970s, and officially only since the 1990s, and comes from the fact that the route has been marked in red on Storstockholms Lokaltrafik's maps at least since the 1970s. Previously, the Red line had been coloured orange on the system map, but as new maps were printed with changes, the colour became increasingly redder in the 1980s.

The Blue line (Swedish: Blå linjen; officially Metro 3, but called Tub 3 ("Tube 3", or abbreviation for "Tunnelbana 3") internally) is one of the three Stockholm Metro lines. It is 25.5 kilometres (15.8 miles) long, and runs from Kungsträdgården via T-Centralen to Västra skogen where it branches in two, and continues to Hjulsta and Akalla as lines 10 and 11 respectively.

T-Centralen is the largest and busiest station on the Stockholm Metro. It is located directly adjacent to Stockholm Central Station and Stockholm City commuter train station, in the Norrmalm district of central Stockholm. T-Centralen is also the name of the terminus for the Spårväg City tram line.

T-Centralen is the only station in Stockholm Metro where all three metro lines converge. In 2018, approximately 340,000 passengers used the metro station daily, with 174,550 boarding and 166,850 alighting.

The record years (Swedish: rekordåren) is a period in the economy of Sweden, dating from the international post–World War II economic expansion to the 1973 oil crisis, and largely coinciding with the mandates of prime ministers Tage Erlander and earliest years of Olof Palme. The concept was originally a satirical left-wing description of the years 1968 to 1970.

Sweden had maintained neutrality during both world wars, and entered the post-war boom with industrial and demographic advantages. Sweden also received aid from the Marshall Plan. Between 1947 and 1974, the Swedish economy grew at an average rate of 12.5% annually. The urban population, living in towns of over 15,000 people, grew from 38% of the total population in 1931 to 74% by 1973. Sustained by an export boom of automobiles, heavy machinery, electronics, shipbuilding, and heavy weapons, the per capita income increased by as much as 2,000%. Sweden had successfully moved into the high-income group of countries by 1955–56.