@ sign
symbol used in the formation of e-mail addresses (“@”)
A/D converter
electronic component for converting analogue signals into digital signals
abacus
mechanical counting aid for calculating the four basic arithmetic operations and extracting a root
abbreviation
time- and/or space-saving textual short forms on coins, seals or in handwriting
abbreviator
writer in the papal chancery who are expert in abbreviations and produce drafts of papal bulls and briefs
academic book
book primarily specific to research and teaching
academic library
library whose collection is primarily focused on academia and research
academic publishing house
specialist publisher of academic books and journals
academy
term for an art school or a learned society dating back to the time of the ancient Greek philosopher Plato
acidity (paper)
an important consideration in papermaking because increased acidity levels (resulting from processes such as sizing) reduce durability
