Overview, Continued Acronyms The following table contains a list of acronyms you must know to understand the material in this chapter: Acronym Meaning CAPS Capital  Letters CL Center  Line LC Lower Case Letters Pixel Picture  Element UC Upper Case Letters In this chapter This chapter covers the following topics: Lettering Topic See Page 5-3 Letter  Nomenclature 5-6 Letter  Geometry 5-13 Letter Classifications 5-18 Letter Strokes 5-27 Letter Compositions 5-32 Lettering Mediums 5-43 Lettering Aids 5-50 Calligraphy 5-54 5-2