This is proposed as a course, or a "meta" course (or disambiguation page) linking to courses/resources on aspects of indicators at various levels in various fields.
- Economic Indicators
- Social Indicators
- Environmental or Ecological Indicators
- Sustainability Indicators
- Chemical Indicators
Acid Base indicators are some examples of the chemical indicators. Substances used to check whether the given substances are acids or bases. examples - phenolphthalein, methyl orange, Litmus . indicators which are obtained from the nature are called natural indicators. Indicators which are prepared in laboratories are called synthesized indicators. Natural indicators -- Litmus , china rose petals, turmeric powder,red cabbage, all the dark coloured flowers petals. Synthesized indicators-- Methyl orange, Phenolphthalein.