TL

• Teens' love, Japanese erotic fiction marketed towards women
• Télé Liban, a Lebanese television network
• Turn Left (newspaper), Cornell University student publication

• Tl (digraph), a digraph representing a voiceless alveolar lateral affricate in some languages
• Tagalog language (ISO 639 alpha-2 code: tl)

• Airnorth (IATA airline code TL), an airline
• Public transport in the Lausanne Region, a transport company
• Teknisk Landsforbund, the Danish Union of Professional Technicians
• Team Liquid, a professional gaming and eSports team and community website

• Liquidus temperature, the maximum temperature at which crystals can co-exist with the melt
• Teralitre (Tl or TL), a metric unit of volume or capacity
• Thallium, symbol Tl, a chemical element
• Thermoluminescence dating, in geochronology
• Total length in fish measurement
• Transmission loss (TL), in acoustics, electronics, optics, and related fields

Computing

• .tl, East Timor's Internet country code top-level domain
• Transform, clipping, and lighting (T&L), in computer graphics

Vehicles

• Acura TL, a mid-size luxury car
• TL11, engine for Leyland Tiger
• Volkswagen TL, a compact car produced in the 1960s and 1970s

Weapons

• TL (missile), series of Chinese air-to-surface missiles
• TL series of Chinese airborne munitions dispensers

• "The TL", nickname for Tenderloin, San Francisco
• East Timor (ISO 3166-1 alpha-2 country code)
• Turkish lira (TL), a currency
• Thameslink, a train operator in the UK
• Tahiti Ligue 1
• Tahiti Ligue 2