So what does this mean, supposedly? Here is some explanation:
Inspector Guardians look carefully and thoroughly at the people and institutions around them. Making up perhaps as much as ten percent of the general population, Inspectors are characterized by decisiveness in practical affairs, are the guardians of institutions, and if only one adjective could be selected, "superdependable" would best describe them. Whether at home or at work, Inspectors are nothing if not dependable, particularly when it comes to examining the people and products they are responsible for-quietly seeing to it that uniform quality is maintained, and that those around them uphold certain standards of attitude and conduct.
These quiet, no-nonsense Guardians have a distaste for and distrust of fanciness in speech, dress, and living space. Their words tend to be simple and down-to-earth, not showy or high-flown; their clothes are often homespun and conservative rather than of the latest fashion; and their home and work environments are usually neat, orderly, and traditional, rather than up-to-date or luxurious. In their choice of personal property (cars, furnishings, jewelry, and so on) price and durability are just as important as comfort or appearance. Classics, antiques, and heirlooms are especially valued, having achieved a certain time-honored status-Inspectors prefer the old-fashioned to the newfangled every time. Even on vacation, Inspectors tend not to be attracted by exotic foods, beverages, or locales.
Their thoroughness and orderliness, combined with their interest in legality and standardization, leads Inspectors to a number of occupations that call for the careful administration of goods and services. Inspectors feel right at home with difficult, detailed forms and columns of figures, and thus they make excellent bank examiners, auditors, accountants, and tax attorneys. Managing investments in securities is likely to interest this type, particularly investments in municipal bonds and blue-chip securities. Inspectors are not likely to take chances either with their own or others' money, and the thought of a bankrupt nation, state, institution, or family gives them more than a little uneasiness. The idea of dishonoring a contract also bothers an Inspector -their word is their bond-and they naturally communicate a message of trustworthiness and stability, which can make them successful in business. With their eye for detail, Inspectors make good business men and women, librarians, dentists, optometrists, legal secretaries, and law researchers. High school and college teachers of business administration, home economics, physical education, civics, and history tend to be Inspectors, as do quartermaster officers in the military.
Yep, sounds like me, for the most part.
Here's another explanation:
ISTJs are often called inspectors. They have a keen sense of right and wrong, especially in their area of interest and/or responsibility. They are noted for devotion to duty. Punctuality is a watchword of the ISTJ. The secretary, clerk, or business(wo)man by whom others set their clocks is likely to be an ISTJ.
As do other Introverted Thinkers, ISTJs often give the initial impression of being aloof and perhaps somewhat cold. Effusive expression of emotional warmth is not something that ISTJs do without considerable energy loss.
ISTJs are most at home with "just the facts, Ma'am." They seem to perform at highest efficiency when employing a step-by-step approach. Once a new procedure has proven itself (i.e., has been shown "to work,") the ISTJ can be depended upon to carry it through, even at the expense of their own health.
ISTJs are easily frustrated by the inconsistencies of others, especially when the second parties don't keep their commitments. But they usually keep their feelings to themselves unless they are asked. And when asked, they don't mince words. Truth wins out over tact. The grim determination of the ISTJ vindicates itself in officiation of sports events, judiciary functions, or an other situation which requires making tough calls and sticking to them.
His SJ orientation draws the ISTJ into the service of established institutions. Home, social clubs, government, schools, the military, churches -- these are the bastions of the SJ. "We've always done it this way" is often reason enough for many ISTJs. Threats to time-honored traditions or established organizations (e.g., a "run" on the bank) are the undoing of SJs, and are to be fought at all costs.
Recognize anyone there? Yeah, me too!