Technical schools have evolved a bit over time but so has almost everything in education today. Before the advent of the computer, technical schools were called trade or vocational schools instead.
Even so, it's not computers alone that are studied in technical schools. In fact, technical schools themselves offer education based on different occupations although each one of them does employ the widespread use of computers.
Information technologies most often refer to the classes technical schools offer that focus on computers, peripheral equipment, software, and everything else that helps drive the industry. Community colleges sometimes offer similar programs but many schools offering this type of education call themselves technical institutes, meaning they aren't affiliated with any publicly funded school system.
Medicine is an industry where technical schools focus on the technologies used in today's health care facilities. Lab technicians, x-ray technicians, and people holding jobs that involve most of the modern medical equipment used today usually got their start by attending technical schools that focus on the world of medicine.
The days of medical records file clerks and secretaries has gone and now the people keeping up with the voluminous amount of paperwork generated by the medical profession is processed by medical records technicians. Some of them train on the job but a good may attend technical schools before landing a job.
The field of dentistry has become very technological, too, and many dental assistants and technicians got their training in technical schools before employment
Where once we took our ailing automobiles to an auto mechanic, we now take them to automotive technicians, many of whom trained in technical schools. The automobile is one machine that has evolved dramatically in the last 100 years and it takes more than a grease monkey to keep them rolling nowadays.
Once you really stop to think about it, there's a technician at the ready for almost every industry and most of them got their pre-employment training by attending technical schools that offered classes in the fields of interest, be it cosmetology, HVAC, utilities, or almost everything under the sun.