The situation of each unit is different, and the software required by units in various industries is also different. According to the actual situation of the unit and the needs of the unit, the software developed is tailor-made for the unit. This customization software allows us to take the example of someone with oversized feet. The shoes he needs are not available in general shoe stores, so he needs to go to the shoe manufacturer or store to customize them! In fact, it’s like this. Everyone’s feet are different. Some people’s feet are good-looking, and some are unnaturally long. Some have athlete’s foot, and some don’t. But generally, for example, 42 shoes can make many people look better. It can be worn by different people, as long as the shoes are not too big or too small on the feet and are comfortable...well, they can be used! That’s fine, same thing, but it doesn’t mean that software is shoes, it’s just an analogy, there’s no need to feel weird. The person upstairs didn’t understand what the original poster meant by asking the question. The unit here is not a mathematical unit of quantity, nor a physical unit, but refers to the two situations. What are the specific operations of a software development company? Same, where does it show up. Usually, an industry software, for example, a certain steel manufacturer, this belongs to the steel industry, and the things they do in this industry are similar, so I provide them with an industry-wide software, although it does not 100% match the products they produce. But 99% of them are included, so there is no need to spend a lot of money to customize one, just use general software to meet their production needs, and software companies also save a lot of trouble, because a general industry software can be sold to many Manufacturer of steel. And customization cannot be said to be a perfect 100% match. It can only be said that customization is required for special situations (general ones cannot meet production needs no matter how they are used). General enterprise units will choose universal ones as long as they are not too different.