In the case of the Caucasian Albanian written language, the span of time between when the script was first seen (though not yet identified) until the first word was deciphered took 11 years. Of course, not all that time was spent trying to crack the code.
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Electron ionization. Electron ionization (EI, formerly known as electron impact ionization and electron bombardment ionization) is an ionization method in which energetic electrons interact with solid or gas phase atoms or molecules to produce ions. EI was one of the first ionization techniques developed for mass spectrometry.