A spacing left side-bearing parameter for calculating ABC width: blank space between the start of the character and the drawn glyph. If the glyph overhangs the left edge of the character, this value is negative.

ABC width – the "escapement" – the horizontal distance that the print position moves to print the character. Equal to the total width of the character, A spacing + B spacing + C spacing.

Adobe registered trade mark of Adobe Systems Inc.

ASCII – "American Standard Code for Information Interchange".

B spacing width of the character's drawn glyph (the 'Black' part).

C spacing right side-bearing: blank space between the drawn glyph and the end of the character. Negative if the glyph overhangs the right edge of the character.

CFF – "Compact Font Format" – extension OTF, often used for embedding PostScript outline-spline fonts in PDF documents.

FRED a RedTitan program for editing for RFF and UFF files.

HP registered trade mark of Hewlett-Packard Development Company, L.P.

Microsoft and MS registered trade marks of Microsoft Corporation in the United States and/or other countries.

OTF – "OpenType Font" – a scalable outline-spline font supported by Windows: see also CFF, TTF, WOFF.

PCL® – "Printer Command Language" from Hewlett-Packard®.

PDF – "Portable Document Format" from Adobe®.

PS – "PostScript®" language from Adobe®.

RedTitan trademark of RedTitan Technology Ltd: see www.redtitan.com

RFF – "Redtitan Font Format" files – contain bitmap images of characters and the information needed to produce a font for all types of printer. Elements of a barcode or logo may be imaged as "characters" and used as a font.

RIF – "Redtitan Image Format" files – images composed of colour-planes of bitmaps.

RTIMAGE The RedTitan program for reading, viewing and writing image files in BMP, RIF, TIFF, PNG and JPEG formats. You may also compare, rotate, trim, center and even set up the image resolution.

TTF – "TrueType font" – an outline-spline font supported by Windows: each character is described by quadratic splines. These glyphs can be scaled to generate fonts at a range of sizes (see also OpenType, WOFF).

TTC – "TrueType Collection" – bundles several related TTF files into one, saving file space. Each character is stored only once, even if if occurs in more than one of the component files.

UFF – "Universal Font Format" – the textual representation of RFF font data (useful, but bulky).

Unicode hexadecimal numbers for specifying characters: see Unicode Consortium character code charts

Windows Trademark of the Microsoft® operating system.

WOFF file contains a compressed TrueType or OpenType outline-spline font and its meta data, designed for use in web-pages.

XML – "eXtensible Markup Language" – an "open standard" language used for data files in which each value is "marked up" with its field name.

XPS – "Xml Paper Specification" from Microsoft® –  a zipped file of XML pages, fonts, images in native format etc. for printing or viewing on screen.