Google.com Yahoo.com and Ask.com compared -- The Best Search Engines! from UC Berkeley (thanks guys!)
Recommended Search Engines: Tables of Features
Some Ways the Recommended Search Engines Differ:
44| Search Engine | Yahoo! Search | Ask.com | |
| www.google.com | search.yahoo.com | www.ask.com | |
| Links to help | Google help pages | Yahoo! help pages | Ask help pages |
| Size, type | HUGE. Size not disclosed in any way that allows comparison. Probably the biggest. | HUGE. Claims over 20 billion total "web objects." | LARGE. Claims to have 2 billion fully indexed, searchable pages. |
| See tests and more charts. | Biggest in tests. | ||
| Noteworthy features and limitations | Popularity ranking using PageRank™. | Shortcuts give quick access to dictionary, synonyms, patents, traffic, stocks, encyclopedia, and more. | Subject-Specific Popularity™ ranking. |
| Indexes the first 101KB of a Web page, and 120KB of PDF's. | Suggests broader and narrower terms. | ||
| ~ before a word finds synonyms sometimes (~help > FAQ, tutorial, etc.) | |||
| Boolean logic | Partial. AND assumed between words. | Accepts AND, OR, NOT or AND NOT, and ( ). Must be capitalized. | Partial. AND assumed between words. |
| (term definition) | Capitalize OR. | You must enclose terms joined by OR in parentheses (classic Boolean). | Capitalize OR. |
| #NAME? | #NAME? | ||
| No ( ) or nesting. | No ( ) or nesting. | ||
| In Advanced Search, partial Boolean available in boxes. | |||
| #NAME? | - excludes | - excludes | - excludes |
| (term definition) | + will allow you to retrieve "stop words" (e.g., +in) | + will allow you to search common words: "+in truth" | + will allow you to retrieve "stop words" (e.g., +in) |
| Sub-Searching | Sort of . At bottom of results page, click "Search within results" and enter more terms. Adds terms. | Add terms. | Sort of . Add terms. |
| (term definition) | |||
| Results Ranking | Based on page popularity measured in links to it from other pages: high rank if a lot of other pages link to it. | Automatic Fuzzy AND. | Based on Subject-Specific Popularity™, links to a page by related pages. |
| (term definition) | Fuzzy AND also invoked. | ||
| Matching and ranking based on "cached" version of pages that may not be the most recent version. | |||
| Field limiting | link: | link: | intitle: |
| (term definition) | site: | site: | inurl: |
| intitle: | intitle: | site: | |
| inurl: | inurl: | ||
| Offers U.S.Gov't Search and other special searches. Patent search. | url: | ||
| hostname: | |||
| (Explanation of these distinctions.) | |||
| Truncation | No truncation. Stems some words. Search variant endings and synonyms separately, separating with OR (capitalized): | Neither. Search with OR as in Google. | Neither. Search with OR as in Google. |
| Stemming | airline OR airlines | ||
| (term definition) | |||
| Language | Yes. Major Romanized and non-Romanized languages in Advanced Search. | Yes. Major Romanized and non-Romanized languages. | Yes. Major Romanized languages. Use Advanced Search to limit. |
| Translation | Yes, in Translate this page link following some pages. To and sometimes from English and major European languages and Chinese, Japanese, Korean. | Yes. | No. |
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