"The purpose of this pronunciation exercise is to remind you that TEX is primarily concerned with high-quality technical manuscripts: Its emphasis is on art and technology, as in the underlying Greek word. With TEX the goal is to produce the finest quality; this requires more attention to detail, but"
"It turns out that ‘b’ is character number 98 in ASCII. So you can typeset the word bubble in a strange way by putting \char98 u\char98\char98 le into your manuscript, if the b-key on your keyboard is broken. (An optional space is ignored after constants like ‘98’. Of course you need the \, c, h, a, "