Osc prog lvds 3.3v 100ppm ends - Allicdata Electronics

Related Categories

< 7 8 9 10 11 >

Allicdata Part#	Mft.Part#	Company	Spec.	QTY.	Pricing(USD)
LR0204F560R-ND	LR0204F560R	TE Connectivity Passive Product	View more Series: LR, Neohm Packaging: Tape & Box (TB) Part Status: Active Resistance: 560 Ohms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.079" Dia x 0.138" L (2.00mm x 3.50mm) Number of Terminations: 2	1000 Order	4000+: $0.0064
LR0204F8K2-ND	LR0204F8K2	TE Connectivity Passive Product	View more Series: LR, Neohm Packaging: Tape & Box (TB) Part Status: Active Resistance: 8.2 kOhms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.079" Dia x 0.138" L (2.00mm x 3.50mm) Number of Terminations: 2	1000 Order	4000+: $0.0064
FMF-25FRF52-11K -ND	FMF-25FRF52-11K	Yageo	View more Series: FMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 11 kOhms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0067
FMF-25FRF52-2K2 -ND	FMF-25FRF52-2K2	Yageo	View more Series: FMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 2.2 kOhms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0067
FMF-25FRF52-91K -ND	FMF-25FRF52-91K	Yageo	View more Series: FMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 91 kOhms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0067
RNF18JTD330K-ND	RNF18JTD330K	Stackpole Electronics Inc.	View more Series: RNF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 330 kOhms Tolerance: 5% Power (Watts): 0.125W, 1/8W Composition: Metal Film Features: Flame Retardant Coating, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.071" Dia x 0.130" L (1.80mm x 3.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0069
FMP-50JT-52-27R -ND	FMP-50JT-52-27R	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 27 Ohms Tolerance: 5% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.0069
FMP-50JT-52-62R -ND	FMP-50JT-52-62R	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 62 Ohms Tolerance: 5% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.0069
FMP-50JT-52-91K -ND	FMP-50JT-52-91K	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 91 kOhms Tolerance: 5% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.0069
FMP-50FR-52-102 K-ND	FMP-50FR-52-102 K	Yageo	View more Series: FMP Packaging: Tape & Reel (TR) Part Status: Active Resistance: 102 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FR-52-13K -ND	FMP-50FR-52-13K	Yageo	View more Series: FMP Packaging: Tape & Reel (TR) Part Status: Active Resistance: 13 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FR-52-27K -ND	FMP-50FR-52-27K	Yageo	View more Series: FMP Packaging: Tape & Reel (TR) Part Status: Active Resistance: 27 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FR-52-37K 4-ND	FMP-50FR-52-37K 4	Yageo	View more Series: FMP Packaging: Tape & Reel (TR) Part Status: Active Resistance: 37.4 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FR-52-4K9 9-ND	FMP-50FR-52-4K9 9	Yageo	View more Series: FMP Packaging: Tape & Reel (TR) Part Status: Active Resistance: 4.99 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-147 R-ND	FMP-50FTF52-147 R	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 147 Ohms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-14K 7-ND	FMP-50FTF52-14K 7	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 14.7 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-23R 7-ND	FMP-50FTF52-23R 7	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 23.7 Ohms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-25K 5-ND	FMP-50FTF52-25K 5	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 25.5 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-2K4 3-ND	FMP-50FTF52-2K4 3	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 2.43 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-35R 7-ND	FMP-50FTF52-35R 7	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 35.7 Ohms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-4K3 -ND	FMP-50FTF52-4K3	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 4.3 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-825 K-ND	FMP-50FTF52-825 K	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 825 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-909 R-ND	FMP-50FTF52-909 R	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 909 Ohms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMP-50FTF52-9K3 1-ND	FMP-50FTF52-9K3 1	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 9.31 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
FMF50SFRF52-6K2 -ND	FMF50SFRF52-6K2	Yageo	View more Series: FMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 6.2 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.007
MFR25SDRF52-118 K-ND	MFR25SDRF52-118 K	Yageo	View more Series: MFR Packaging: Tape & Reel (TR) Part Status: Active Resistance: 118 kOhms Tolerance: 0.5% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
MFR25SDRF52-510 R-ND	MFR25SDRF52-510 R	Yageo	View more Series: MFR Packaging: Tape & Reel (TR) Part Status: Active Resistance: 510 Ohms Tolerance: 0.5% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
MFR25SDRF52-576 R-ND	MFR25SDRF52-576 R	Yageo	View more Series: MFR Packaging: Tape & Reel (TR) Part Status: Active Resistance: 576 Ohms Tolerance: 0.5% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
MFR25SDRF52-6K2 -ND	MFR25SDRF52-6K2	Yageo	View more Series: MFR Packaging: Tape & Reel (TR) Part Status: Active Resistance: 6.2 kOhms Tolerance: 0.5% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.075" Dia x 0.134" L (1.90mm x 3.40mm) Number of Terminations: 2	1000 Order	5000+: $0.007
RNMF12FTD28K7-N D	RNMF12FTD28K7	Stackpole Electronics Inc.	View more Series: RNMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 28.7 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Retardant Coating, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.093" Dia x 0.250" L (2.35mm x 6.35mm) Number of Terminations: 2	1000 Order	5000+: $0.0071
RNMF12FTD49K9-N D	RNMF12FTD49K9	Stackpole Electronics Inc.	View more Series: RNMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 49.9 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Retardant Coating, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.093" Dia x 0.250" L (2.35mm x 6.35mm) Number of Terminations: 2	1000 Order	5000+: $0.0071
RNMF12FTD2K43-N D	RNMF12FTD2K43	Stackpole Electronics Inc.	View more Series: RNMF Packaging: Tape & Reel (TR) Part Status: Active Resistance: 2.43 kOhms Tolerance: 1% Power (Watts): 0.5W, 1/2W Composition: Metal Film Features: Flame Retardant Coating, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.093" Dia x 0.250" L (2.35mm x 6.35mm) Number of Terminations: 2	1000 Order	5000+: $0.0071
FMP100JT-52-130 K-ND	FMP100JT-52-130 K	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 130 kOhms Tolerance: 5% Power (Watts): 1W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0071
FMP100JT-52-47K -ND	FMP100JT-52-47K	Yageo	View more Series: FMP Packaging: Tape & Box (TB) Part Status: Active Resistance: 47 kOhms Tolerance: 5% Power (Watts): 1W Composition: Metal Film Features: Flame Proof, Safety Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0071
5043ED43K00F12A F5-ND	SFR2500004302FR 500	Vishay BC Components	View more Series: SFR25 Packaging: Tape & Reel (TR) Part Status: Active Resistance: 43 kOhms Tolerance: 1% Power (Watts): 0.4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.098" Dia x 0.256" L (2.50mm x 6.50mm) Number of Terminations: 2	1000 Order	5000+: $0.0072
PPC7.32KYTR-ND	SFR2500007321FR 500	Vishay BC Components	View more Series: SFR25 Packaging: Tape & Reel (TR) Part Status: Active Resistance: 7.32 kOhms Tolerance: 1% Power (Watts): 0.4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Axial Size / Dimension: 0.098" Dia x 0.256" L (2.50mm x 6.50mm) Number of Terminations: 2	1000 Order	5000+: $0.0072
SFR16S0007500JR 500-ND	SFR16S0007500JR 500	Vishay BC Components	View more Series: SFR16S Packaging: Tape & Reel (TR) Part Status: Active Resistance: 750 Ohms Tolerance: 5% Power (Watts): 0.5W, 1/2W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Size / Dimension: 0.075" Dia x 0.138" L (1.90mm x 3.50mm) Number of Terminations: 2	1000 Order	5000+: $0.0072
SFR2500001472FA 500-ND	SFR2500001472FA 500	Vishay BC Components	View more Series: SFR25 Packaging: Tape & Box (TB) Part Status: Active Resistance: 14.7 kOhms Tolerance: 1% Power (Watts): 0.4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Size / Dimension: 0.098" Dia x 0.256" L (2.50mm x 6.50mm) Number of Terminations: 2	1000 Order	5000+: $0.0072
SFR2500003602JR 500-ND	SFR2500003602JR 500	Vishay BC Components	View more Series: SFR25 Packaging: Tape & Reel (TR) Part Status: Active Resistance: 36 kOhms Tolerance: 5% Power (Watts): 0.4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Size / Dimension: 0.098" Dia x 0.256" L (2.50mm x 6.50mm) Number of Terminations: 2	1000 Order	5000+: $0.0072
MFR-25FRFPN150R -ND	MFR-25FRFPN150R	Yageo	View more Series: MFR Packaging: Tape & Reel (TR) Part Status: Active Resistance: 150 Ohms Tolerance: 1% Power (Watts): 0.25W, 1/4W Composition: Metal Film Temperature Coefficient: 100ppm/C Operating Temperature: -55C ~ 155C Package / Case: Axial Supplier Device Package: Panasert Size / Dimension: 0.094" Dia x 0.248" L (2.40mm x 6.30mm) Number of Terminations: 2	1000 Order	5000+: $0.0072

< 7 8 9 10 11 >

Hot Searches: osc prog lvds 3.3v 100ppm en/ds osc prog lvds 5v 100ppm en/ds osc prog cmos 3.3v 100ppm en/ds osc prog cmos 3.3v 100ppm stby osc prog hcmos 3.3v 100ppm en/ds osc prog ttl 3.3v 100ppm stby osc prog ttl 3.3v 100ppm en/ds osc prog ttl 3.3v 100ppm stby th osc prog pecl 3.3v 100ppm en/ds osc prog cmos 1.8v 100ppm en/ds osc prog cmos 1.8v 100ppm stby osc prog cmos 2.5v 100ppm en/ds osc prog cmos 2.5v 100ppm stby osc prog cmos 5v 100ppm stby th osc prog ttl 5v 100ppm stby th osc prog cmos 5v 100ppm en/ds osc prog cmos 5v 100ppm stby smd osc prog ttl 5v 100ppm stby smd osc prog hcmos 5v 100ppm en/ds osc prog ttl 100ppm stby smd

Search Result:osc prog lvds 3.3v 100ppm ends

Related Categories