lower-case letters

I look at that note, the prurience and prissiness, the mashup of capital and lower-case letters, the unlikeliness that its author has a smaller bum or a bigger willy, and I feel sure they voted for Brexit.

Upper-case letters indicate novel exon 5′ and lower-case letters indicate intron 5.

Even typing those lower-case letters fills me with low-level rage and when I happened upon one of his poems recently – the one about the little lame balloon man who goes far and wee – rather than being charmed, I thought: oh for goodness sake.

The Virgin Media Super Hub 2 used passwords that were just eight characters long, and used only lower-case letters.

Some use a long password with mixture of upper and lower-case letters, numbers and sometimes symbols.