It can be CAD or CorelDRAW.

CAD is an automatic computer-aided design software that can be used to draw two-dimensional drawings and basic three-dimensional designs. It can be automatically drawn without programming. Therefore, it is widely used around the world and can be used in fields such as civil engineering construction, decoration, industrial drawing, engineering drawing, electronic industry, clothing processing, etc.

CorelDRAW is a vector graphics production tool software that provides designers with functions such as vector animation, page design, website creation, bitmap editing, and webpage animation.

It includes two drawing applications: one for vector graphics and page design, and the other for image editing. The combination of this drawing software provides users with powerful interactive tools, enabling them to create various dynamic special effects and real-time effects of dot matrix images in simple operations.

application area 

Engineering drawings: architectural engineering, decoration design, environmental art design, hydropower engineering, civil engineering, etc.

Industrial drawing: precision parts, molds, equipment, etc.

Clothing processing: Clothing plate making.

Electronic Industry: Printed Circuit Board Design.

Widely used in civil engineering, decoration, urban planning, landscape design, electronic circuits, mechanical design, clothing, shoes and hats, aerospace, light industry and chemical industry, and other fields.

In different industries, Autodesk has developed specialized versions and plug-in AutoCADMechanical versions in the mechanical design and manufacturing industry.

Distribute AutoCADElectrical books in the electronic circuit design industry.

The version was released for survey, earthworks, and road design.

AutoCAD Simplified Chinese version is generally used in school teaching and training.

The cloud computing 3D core technology CAD drawing of the Qingfeng interior design training institution has improved efficiency.

Generally speaking, companies in the clothing, machinery, electronics, and construction industries do not have special requirements for AutoCADSimplified textbooks.

So AutoCADSimplified is basically a universal version.

Of course, there is also a corresponding AutoCADMechanical version for machinery.