1, numbers and mathematical symbols:
A number is a symbol representing quantity, and ten basic arrays from 0 to 9 synthesize different numbers. The corresponding mathematical operations are represented by mathematical symbols such as plus sign, minus sign, multiplication sign and division sign. For example,+stands for addition,-stands for subtraction, × stands for multiplication and ∫ stands for division.
2. Letters and letter symbols:
Letters represent the most basic sound unit in a language and are used to form words and sentences. Letter symbols usually represent specific concepts, objects or units, such as "A" for the first letter of the English alphabet and "M" for the unit of meters. Letter symbols are also often used to represent unknowns or variables, such as "X" and "Y" to represent unknowns in algebraic equations.
3. National flag and national emblem:
The national flag is the symbol of every country, and it is a special flag composed of colors, patterns and symbols. The national flag of each country usually represents the independence, unity and identity of the country. The national emblem is the official symbol of a country, usually composed of specific symbols, animals and plants, buildings, etc., representing the authority and image of the country.
4. Nameplates and signs:
A plaque is a signboard used to mark the name and symbol of a building, enterprise, organization or place. Plaques are usually composed of words and patterns, which give people intuitive information and identification. A logo is a specific pattern, mark or figure to represent a brand, product, organization or event. Signs convey the meaning of symbol and recognition through unique images and designs.
5. Maps and geographical symbols:
Maps are the epitome of the earth's surface, which are used to represent geographical space and geographical features. A geographical symbol on a map is a kind of figure or symbol, which is used to represent geographical entities, landforms, transportation facilities, etc. For example, the ocean is represented by blue, the mountains are represented by contour lines, the roads are represented by line segments, the cities are represented by points, and the compass is represented by arrows.
6. Signals and signs:
Signals are symbols that convey specific information and instructions and are used to guide people's behavior and decision-making. Traffic lights use red, yellow and green signals to indicate stopping, warning and passing. Signs are graphics, words or symbols designed to convey specific information, rules or warnings to the public. For example, no smoking signs, no traffic signs, emergency exit signs, etc.
7. Arrow and direction identification:
Arrows are symbols indicating directions, which are often found in traffic signs, maps, signs, etc. The shape and direction of the arrow indicate different directions such as forward, backward, left and right. Directional signs are symbols and indicators used to indicate direction, position or destination, such as compasses and route signs.