T4
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T4 or T-4 is used for various purposes as a designation, abbreviation or identifier:
- In endocrinology, see Thyroxine.
- In topology, see Normal space.
- The T4 phage is a bacteriophage.
- The T4 euthanasia program was established by Nazi Germany in order to maintain the supposed purity (eugenics)of the so-called Aryan race by systematically killing children and adults born with physical deformities or suffering from mental illness.
- An aircraft, the T-4
- T4(Channel 4) is a Sunday morning teen-aimed slot on Channel 4 (UK).
- In Canadian tax law, a T4 is a renumeration of income tax and other deductions taken by the government over the period of one fiscal year, and is used in filing an Income Tax Return.