What do scanning electron microscopes and transmission electron microscope ms have in common?

Form larger (magnified) and more detailed (highly resolved) images of small objects or small areas of larger objects e.g. a leaf, part of a bone, etc. than can be formed by the human eye.
Used in study and research in biology and medical sciences (more about histology), material sciences e.g. metallurgy and other aspects of science.
Specimens must be carefully prepared using techniques appropriate for both the equipment and the sample e.g. slicing, staining, mounting, etc. (e.g. how to prepare histology slides).