T is the 20th letter of the Latin alphabet. Today's letter T is a variant of Phoenician hieroglyphic letters. Early hieroglyphics, like today's letter X, were called taw, which means "mark".
Extended data
The meaning of the letter t:
1, China train number means express train, and the speed is between express train (K) and EMU train;
2.t is sometimes used as an abbreviation for height (but rarely used);
3. Specification of biological kit: 96T means that 94 specimens can be made, 2 standard controls, and 48T means that 47 specimens can be made;
4.t stands for the tool function in CNC machine tools, such as t0 1 0 1-the former 0 1 finger 1 cutter, and the latter 01finger1cutter is offset;
5.t stands for Tesla, an electromagnetic unit, to commemorate nikola tesla, a scientist who introduced the electrical age;
6.t stands for torque in material mechanics;
7.T stands for Soviet T- series tanks such as T-28, T-34, T-43, T-44, T-54 and so on. T is the first letter of "tank" (танк) in Russian;
8.T also refers to the experimental armored vehicles in the United States (T is the initials of the English word "Test")-such as T 17E 1 armored vehicles, T26E3 heavy tank (the predecessor of M26 Pershing) and T26E4 Super Pershing;
9.t stands for a level in the entertainment software grading system ESRB, which means that (Teen) is suitable for people over 13 years old.