Inside Painted Snuff Bottles-One of the most famous and collectible types of snuff bottles is the inside or reverse painted. These little masterpieces are painted by reaching down through the neck of the bottle with a tiny curved brush or piece of bamboo.
A signature block (often abbreviated as signature, sig block, sig file, .sig, dot sig, siggy, or just sig) is a block of text automatically appended at the bottom of an email message, Usenet article, or forum post. 1  1 Email and Usenet.  1.1 Signatures in Usenet postings.
Digital signatures. A digital signature is the term used for marking or signing an electronic document, by a process meant to be analogous to paper signatures, but which makes use of a technology known as public-key cryptography. Additional security properties are required of signatures in the electronic world.