The orthography of e-TEX

The e-TeX team request that wherever e-TeX is referred to in text, it be represented by the use of its (e-)TeX logo ($\varepsilon$-\TeX), by the nearest HTML equivalent (e-T<sub><big>E</big></sub>X), or if all else fails, by the simple ASCII string "e-TeX". However, bearing in mind (a) the ISO 9660 standard for CD-ROMs (which precludes the use of a hyphen in filenames), and (b) the problems of moving files between case-sensitive (e.g. Unix) and case-insensitive (e.g. VMS, MS/DOS) operating systems, it is strongly recommended that wherever "e-TeX" occurs in the context of a filename, logical name, DCL symbol or analogous construct it be spelled (a) without the hyphen, and (b) entirely in lower case. It is further recommended that the component "etex" of such a name be separated from any subsequent component(s) by an underscore, unless this would (in the case of a filename) cause it to exceed the MS/DOS limit of 8+3 characters in which case the underscore should be omitted. Similar considerations may also be taken into account when constructing logical names, DCL symbols, etc, although the upper bound will then be system-dependent.