The periodic table - classification of elements. Definitions of groups, periods, alkali metals, alkaline earth metals, halogens, and noble gases. How metals, non-metals, and metalloids can be identified by the position on the periodic table. Created by Jay. Introduction to the periodic table. The periodic table - classification of elements. Groups of the periodic table. Counting valence electrons for main group elements.
OPENBook is software developed for blind and visually impaired individuals to read, edit, and manage scanned images from books, magazines, manuals, bills, newspapers, and other printed documents. It essentially turns your computer system into a scanning and reading machine.
PostBooks is an open source software which acts like accounting, ERP, and CRM software for a small or medium-sized enterprise. This ERP software comes with modules like, accounting, sales, purchasing, product definition, inventory, and distribution, etc. Within the accounting module, it allows you to deal with general ledger, bank reconciliation, accounts payable and receivable, financial reporting, etc. Sales module lets you deal with order entry, quotes, shipping, sales reporting.