Refine My Results

Creation Date 

1. Before 1960  (16,391)
2. 1960 To 1975  (14,323)
3. 1976 To 1991  (56,143)
4. 1992 To 2008  (196,737)
5. After 2008  (471,265)
6. More options 

New Records 

1. New From Last Month  (22,755)
2. More options 

Resource Type 

1. Patents  (756,955)
2. Books  (67)
3. magazinearticle  (41)
4. Articles  (23)
5. Newspaper Articles  (14)
6. More options 

Subject 

1. Games  (757,000)
2. Sports  (756,978)
3. Human Necessities  (756,955)
4. Video Games  (756,808)
5. Card, Board, Or Roulette Games  (756,773)
6. Indoor Games Using Small Moving Playing Bodies  (756,773)
7. Games Not Otherwise Provided For  (756,773)
8. Physics  (154,326)
9. Calculating  (91,685)
10. Computing  (91,685)
11. Counting  (91,685)
12. Electric Digital Data Processing  (56,482)
13. Checking-Devices  (52,212)
14. Coin-Freed Or Like Apparatus  (47,090)
15. Electricity  (34,695)
16. Electric Communication Technique  (28,184)
17. Image Data Processing Or Generation, In General  (22,175)
18. Education  (20,960)
19. Advertising  (20,950)
20. More options 

Databases 

1. esp@cenet  (756,955)
2. ProQuest Central  (72)
3. Ebook Central - Academic Complete  (15)
4. Free E- Journals  (8)
5. ProQuest One Psychology  (8)
6. Education Resources Information Center (ERIC)  (7)
7. ROAD: Directory of Open Access Scholarly Resources  (5)
8. DOAB: Directory of Open Access Books  (4)
9. DOAJ Directory of Open Access Journals  (3)
10. OAPEN  (3)
11. MEDLINE  (3)
12. U.S. Government Documents  (2)
13. MIT Press Direct OA  (1)
14. Springer Nature OA/Free Journals  (1)
15. SpringerLink Fully Open Access Books  (1)
16. JSTOR eBooks: Open Access  (1)
17. Project MUSE Open Access Books  (1)
18. Canada Commons: Books & Documents  (1)
19. Coronavirus Research Database  (1)
20. ScholarVox International  (1)
21. More options 

Language 

1. English  (614,505)
2. Japanese  (217,015)
3. Chinese  (61,965)
4. French  (51,397)
5. German  (28,576)
6. Korean  (16,345)
7. Spanish  (9,063)
8. Russian  (3,496)
9. Portuguese  (3,442)
10. Italian  (2,496)
11. Dutch  (717)
12. Swedish  (654)
13. Finnish  (546)
14. Danish  (446)
15. Czech  (402)
16. Norwegian  (274)
17. Romanian  (265)
18. Polish  (243)
19. Turkish  (217)
20. Ukrainian  (127)
21. More options 

Journal Title 

1. Amusement Business  (3)
2. Business Wire  (14)
3. Cfo  (3)
4. Cosmopolitan  (2)
5. Journal Of Autism And Developmental Disorders  (2)
6. Journal Of Leisure Research  (2)
7. Monthly Labor Review  (2)
8. Newsweek  (2)
9. Parks & Recreation  (6)
10. The Middle East  (2)
11. More options