Tally is an Indian multinational technology company and its flagship enterprise resource planning (ERP) software, primarily used by small and medium businesses (SMBs). The full form of TALLY has been cited as Transactions Allowed in a Linear Line Yard.

This software is a comprehensive business management solution, especially popular for accounting and Goods and Services Tax (GST) compliance in India. 

Key features and uses of Tally software include:

• Accounting & Invoicing: Managing ledgers, creating professional, GST-compliant invoices, and handling multiple currencies.
• Inventory Management: Tracking stock, managing godowns (warehouses), and controlling inventory.
• Taxation & Compliance: Built-in modules for GST calculations, e-invoicing, e-way bills, and filing various returns.
• Banking: Features like automated bank reconciliation, connected banking for real-time updates, and payment QR codes on invoices.
• Payroll: Managing employee salaries and related processes. 

The latest version of the software is called TallyPrime, which replaced Tally.ERP 9 in 2020.