Sewing and all related crafts and activities cover a really wide range of different types of work. In other words, depending on what you intend to create, you need to have the appropriate tools. That's why there are so many different kinds of sewing machines out there.
All sewing machines can be separated into two main categories. Industrial sewing machines and home sewing machines. We are going to briefly cover the most popular of those types.
Industrial ones are made specifically for one type of work and they do that work perfectly. However, since they are specialized for sewing a certain kind of projects, they can't do much other than that. The other characteristic they possess is the fact that they are made very sturdy and can last for a very long time without almost any kind of mechanical maintenance.
Home sewing machines are, as their name implies, designed to be used at home by both experienced sewing enthusiasts and complete beginners, depending on the model of the machine. They are made so that you can make various kinds of projects and conduct different kind of sewing work. But even so, they also tend to have one certain area of expertise in which they excel.
Now that we've covered the main two groups, let's see how sewing machines can be separated into different categories based on what kind of work they do and how they do it.
Related: Types of sewing machines - the ultimate guide
Mechanical sewing machines are the ones that don't have those fancy modern additions like USB sticks or Wi-Fi connections or such. Most of their parts and functions are mechanical and are operated manually by the user. For example, you thread the needle yourself, adjust the tension yourself, adjust the presser foot yourself and so on. Both the old school cool models that don't run on electricity and the modern ones with electromotors fit into this category. Mechanical sewing machines are usually quite easy to use and that makes them a great choice for beginners. They have the basic capabilities but can perform a solid number of tasks. They are also very affordable and easily fixed when broken.
Computerized sewing machines are the complete opposite. They are almost entirely automatic and don't require you to do much besides the actual sewing. These models have some useful modern additions like internal memory that allows you to input some cool stuff into it like your own original stitch type or embroidery design and so on. They come pricey and aren't very appropriate for beginners because they have a ton of functions and can perform a wide variety of tasks. Repairs are a drag because they take a long time to be finished and can cost you quite some money.
Electronic sewing machines are inbetween those two. They're hybrids of computerized and mechanical machines. Some functions are automated and some are done manually. Portable sewing machines usually fit into this category.
Embroidery sewing machines are designed for embroidery work obviously. They can imprint different kinds of complex and interesting designs and patterns on fabrics. These machines come as both industrial and computerized models.
Overlock sewing machines are the best at connecting two pieces of fabric and giving them a finished edge. Thin, thick, hard or soft, stretch or sticky materials don't present a problem for these machines.
So there you have it, those are your sewing machine types!