What animal is depicted in this image labelled “weefil”?
In serial numbers etc., there are many cases where you can't tell if the intended character is a number or a letter. For example, the number 0 and the letter O, the number 1 and the letters l or I, ...
Generally this may be called typo but when particularly two letters of a word are mistakenly swapped, what is this error called? Some examples: teh > the fromat > format comptuer > computer