text: **1 Introduction**
  
  The Non-Annex I Inventory software (NAIIS) web application is a web-based tool developed for use by Parties not 
  included in Annex I to the Convention (non-Annex I Parties) to estimate and report their national greenhouse gas 
  inventories (GHG inventories). As per Article 4, paragraph 1 (a), and Article 12, paragraph 1 (a) of the Convention, 
  non-Annex I Parties are required to communicate to the Conference of the Parties a national inventory of 
  anthropogenic emissions by sources and removals by sinks of all greenhouse gases (GHGs) not controlled by the 
  Montreal Protocol, to the extent their capacities permit, following the guidelines contained in the annex to 
  decision17/CP.8. 
  
  In order to assist non-Annex I Parties in estimating and reporting their GHG inventories as part of their national 
  communications, the secretariat developed an Excel-based software which incorporated all the elements of a national 
  GHG inventory prescribed by decision 17/CP.8. The software was based on the IPCC inventory software version 
  1.1, which used the Tier 1 methodologies for estimating GHG emissions and removals for all source categories 
  included in the Revised 1996 IPCC Guidelines, and further complemented by the GPGs.1 