4T

• 0-4-4
• 0-6-4
• 0-8-4T
• 2-2-4
• 2-4-4
• 2-6-4
• 2-8-4
• 4-6-4
• 4-tert-Butylcatechol
• BR Standard Class 4 2-6-4T
• Bristol and Exeter Railway 4-2-4T locomotives
• Four Tet
• Fourth Transformation
• Highland Railway Drummond 0-4-4T Class
• Highland Railway Drummond 0-6-4T Class
• LMS 2-Cylindered Stanier 2-6-4T
• LMS 3-Cylindered Stanier 2-6-4T
• LMS Fairburn 2-6-4T
• LMS Fowler 2-6-4T
• LMS Stanier 2-6-4T (disambiguation)
• LMS Stanier Class 2 0-4-4T
• LMS/BR Class 4 2-6-4T locomotives
• LWD Szpak
• MMDA (drug)
• Piaggio Zip
• T4 (disambiguation)
• TTTT
• The Four T's (disambiguation)
• The Invisible Enemy (Doctor Who)
• Thiotrisescaline
• Toyota T engine