Top 10 most popular search engines?

You know, aside from the foremost obvious computer program. And probably the second most blatant one too. if truth be told I’ll begin once more, what area unit the Ten most well-liked search engines when Google and Bing?

The first list below contains the foremost common search engines presently accessible, ordered by most to least common within the United States. The ranking is per eBiz, it’s so as of calculable distinctive monthly guests
Google index Size:-
we are using a shorthand notation for index definitions. The following definition denotes an index of kind,model with property prop1 ascending and prop2 descending

Index(model, prop1, -prop2)

This is equivalent to the following configuration in index.yaml:
indexes:
- kind: model
  ancestor: no

  properties:
  - name: prop1
  - name: prop2

    direction: desc

or this configuration in datastore-indexes.xml:
<datastore-indexes>
    <datastore-index kind="model" ancestor="false">
        <property name="prop1" direction="asc" />
        <property name="prop2" direction="desc" />
    </datastore-index>

</datastore-indexes>
Google Photo index:- 

First of all, Id needs to have a tag, size, aspect, color, rating, comment etc.

If you know that you will be running queries of the form
(SELECT * FROM Photo WHERE license=<reuse> ORDER BY date_added DESC)

The following index must be added to your application at deployment time:
Index(Photo, license, -date_added)

If this index does not exist, the data store returns a Need Index Error in Python, or a DatastoreNeedIndexException in Java, every time this query is run.

Index(model, prop1, -prop2)

Index(model, prop1, -prop2)

Index(model, prop1, -prop2)

Index(model, prop1, -prop2)