Ceramic capacitor - Allicdata Electronics

Related Categories

< 244 245 246 247 248 >

Allicdata Part#	Mft.Part#	Company	Spec.	QTY.	Pricing(USD)
13219-ND	13219	Aven Tools	View more Part Status: Obsolete Tool Type: Screwdriver Tip - Type: Phillips Size: #0 Length - Blade: 0.59" (15.0mm) Features: Ceramic Blades, ESD Safe Weight: 0.05 lb (22.68g)	1000 Order	1+: $0
243-1172-ND	13225	Aven Tools	View more Part Status: Active Tool Type: Screwdriver Tip - Type: Slotted Size: 1.8mm Length - Blade: 0.59" (15.0mm) Features: Ceramic Blades, ESD Safe Weight: 0.05 lb (22.68g)	83 Order	1+: $6.0669
SS4120-1P-ND	SS4120-1P	MG Chemicals	View more Series: RTV Part Status: Active Type: Silicone Primer For Use With/Related Products: Ceramic, Metal, Plastic, Wood Shipping Info: Due to possible restrictions, a change in ship method may be required.	1000 Order	1+: $120.431
PT7C5028C1-6GDE -ND	PT7C5028C1-6GDE	Diodes Incorporated	View more Part Status: Obsolete Type: Ceramic Operating Temperature: -40C ~ 85C Mounting Type: Surface Mount Package / Case: Die	1000 Order	1+: $0
PT7C5028C3-6GDE -ND	PT7C5028C3-6GDE	Diodes Incorporated	View more Part Status: Obsolete Type: Ceramic Operating Temperature: -40C ~ 85C Mounting Type: Surface Mount Package / Case: Die	1000 Order	1+: $0
LTC1064CSW#PBF- ND	LTC1064CSW#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 4 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: LTC1064	157 Order	--
MAX262ACWG+T-ND	MAX262ACWG+T	Maxim Integrated	View more Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: MAX262	1000 Order	1+: $0
MAX265BEPI-ND	MAX265BEPI	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Through Hole Package / Case: 28-DIP (0.600", 15.24mm) Supplier Device Package: 28-PDIP Base Part Number: MAX265	1000 Order	1+: $0
LTC1064-4CN#PBF -ND	LTC1064-4CN#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Cauer, Low Pass Switched Capacitor Frequency - Cutoff or Center: 100kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Through Hole Package / Case: 14-DIP (0.300", 7.62mm) Supplier Device Package: 14-PDIP Base Part Number: LTC1064	1000 Order	50+: $10.7316
MAX7491EEE+-ND	MAX7491EEE+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 40kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 2.7 V ~ 3.6 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-QSOP Base Part Number: MAX7491	398 Order	1+: $3.6477 10+: $3.5664
MAX261AEWG+T-ND	MAX261AEWG+T	Maxim Integrated	View more Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: MAX261	1000 Order	1+: $0
MAX7405CPA+-ND	MAX7405CPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Bessel, Low Pass Switched Capacitor Frequency - Cutoff or Center: 5kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.7 V ~ 3.6 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7405	4 Order	1+: $4.095 10+: $3.9255 50+: $3.8637
MAX7408CPA+-ND	MAX7408CPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Elliptic, Low Pass Switched Capacitor Frequency - Cutoff or Center: 15kHz Number of Filters: 1 Filter Order: 5th Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7408	1000 Order	150+: $1.4527
MAX265BCPI-ND	MAX265BCPI	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Through Hole Package / Case: 28-DIP (0.600", 15.24mm) Supplier Device Package: 28-PDIP Base Part Number: MAX265	1000 Order	1+: $0
MAX7400EPA+-ND	MAX7400EPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Elliptic, Low Pass Switched Capacitor Frequency - Cutoff or Center: 10kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7400	84 Order	1+: $4.6116 10+: $4.4232 50+: $4.3537
MAX7400CPA+-ND	MAX7400CPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Elliptic, Low Pass Switched Capacitor Frequency - Cutoff or Center: 10kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7400	74 Order	1+: $3.1626 10+: $3.036 50+: $2.9881
V2F118X500Y3DRP -ND	V2F118X500Y3DRP	AVX Corporation	View more Series: TransFeed Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Voltage - Clamping: 50V Technology: TVS with Feed Through Capacitor Number of Circuits: 1 Applications: General Purpose Mounting Type: Surface Mount Package / Case: 0805 (2012 Metric) Supplier Device Package: 0805	1000 Order	4000+: $0.1458
LTC1069-7CS8#PB F-ND	LTC1069-7CS8#PB F	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Linear Phase, Low Pass Switched Capacitor Frequency - Cutoff or Center: 200kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 5V, 5V Mounting Type: Surface Mount Package / Case: 8-SOIC (0.154", 3.90mm Width) Supplier Device Package: 8-SOIC Base Part Number: LTC1069	319 Order	1+: $6.0543 25+: $4.0202 100+: $3.213
LTC1064-2CN#PBF -ND	LTC1064-2CN#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Butterworth, Low Pass Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Through Hole Package / Case: 14-DIP (0.300", 7.62mm) Supplier Device Package: 14-PDIP Base Part Number: LTC1064	89 Order	1+: $10.332 25+: $8.5789 100+: $7.2293
MAX265BEWI-ND	MAX265BEWI	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 28-SOIC (0.295", 7.50mm Width) Supplier Device Package: 28-SOIC Base Part Number: MAX265	1000 Order	1+: $0
LTC1064-1ACN#PB F-ND	LTC1064-1ACN#PB F	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Cauer, Low Pass Switched Capacitor Frequency - Cutoff or Center: 20kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Through Hole Package / Case: 14-DIP (0.300", 7.62mm) Supplier Device Package: 14-PDIP Base Part Number: LTC1064	1000 Order	50+: $16.322
MAX7401EPA+-ND	MAX7401EPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Bessel, Low Pass Switched Capacitor Frequency - Cutoff or Center: 5kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7401	151 Order	--
UM25GC12-BTHR-N D	UM25GC12-BTHR	Mechatronics Fan Group	View more Series: UM25GC12 Part Status: Obsolete Voltage - Rated: 115VAC Size / Dimension: Round - 254mm Dia Width: 89.00mm Bearing Type: Ball Features: Permanent Split Capacitor Motor Termination: 2 Terminals Operating Temperature: -40 ~ 158F (-40 ~ 70C) Approvals: CE, cUL, TUV, UL	1000 Order	1+: $0
MAX7491CEE+-ND	MAX7491CEE+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 40kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 2.7 V ~ 3.6 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-QSOP Base Part Number: MAX7491	28 Order	1+: $2.1987 10+: $2.1055 50+: $2.0725
MAX291CPA-ND	MAX291CPA	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Butterworth, Low Pass Switched Capacitor Frequency - Cutoff or Center: 25kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 5V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX291	1000 Order	1+: $0
MAX264AEPI+-ND	MAX264AEPI+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Through Hole Package / Case: 28-DIP (0.600", 15.24mm) Supplier Device Package: 28-PDIP Base Part Number: MAX264	28 Order	1+: $14.7105 10+: $14.1025 50+: $13.8802
LTC1164CSW#PBF- ND	LTC1164CSW#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 20kHz Number of Filters: 4 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: LTC1164	1000 Order	96+: $7.7112
478-2484-2-ND	V2F114C300Y1FDP	AVX Corporation	View more Series: TransFeed Packaging: Tape & Reel (TR) Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Voltage - Clamping: 32V Technology: TVS with Feed Through Capacitor Number of Circuits: 1 Applications: General Purpose Mounting Type: Surface Mount Package / Case: 0805 (2012 Metric) Supplier Device Package: 0805	10000 Order	1000+: $0.217 2000+: $0.1966 5000+: $0.1831 10000+: $0.1808
MF10ACN-ND	MF10ACN	Texas Instruments	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Obsolete Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 200kHz Number of Filters: 2 Filter Order: 4th Voltage - Supply: 9 V ~ 14 V Mounting Type: Through Hole Package / Case: 20-DIP (0.300", 7.62mm) Supplier Device Package: 20-DIP Base Part Number: MF10-N	1000 Order	1+: $0
LTC1064-4MJ-ND	LTC1064-4MJ	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Obsolete Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Cauer, Low Pass Switched Capacitor Frequency - Cutoff or Center: 100kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Through Hole Package / Case: 14-CDIP (0.300", 7.62mm) Supplier Device Package: 14-CERDIP Base Part Number: LTC1064	1000 Order	1+: $0
MAX263ACPI+-ND	MAX263ACPI+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Through Hole Package / Case: 28-DIP (0.600", 15.24mm) Supplier Device Package: 28-PDIP Base Part Number: MAX263	21 Order	1+: $9.891 10+: $9.4834 50+: $9.3338
LTC1064CN#PBF-N D	LTC1064CN#PBF	Linear Technology/Analog Devices	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 4 Filter Order: 8th Voltage - Supply: 2.37 V ~ 8 V Mounting Type: Through Hole Package / Case: 24-DIP (0.300", 7.62mm) Supplier Device Package: 24-PDIP Base Part Number: LTC1064	61 Order	1+: $9.6894 25+: $6.4323 100+: $5.3979
MAX7407EPA+-ND	MAX7407EPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Elliptic, Low Pass Switched Capacitor Frequency - Cutoff or Center: 10kHz Number of Filters: 1 Filter Order: 8th Voltage - Supply: 2.7 V ~ 3.6 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7407	1000 Order	100+: $3.7786
MAX7490CEE+-ND	MAX7490CEE+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 40kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Surface Mount Package / Case: 16-SSOP (0.154", 3.90mm Width) Supplier Device Package: 16-QSOP Base Part Number: MAX7490	125 Order	1+: $3.3012 10+: $3.1664 50+: $3.1166
MAX7409CPA+-ND	MAX7409CPA+	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Lead free / RoHS Compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Bessel, Low Pass Switched Capacitor Frequency - Cutoff or Center: 15kHz Number of Filters: 1 Filter Order: 5th Voltage - Supply: 4.5 V ~ 5.5 V Mounting Type: Through Hole Package / Case: 8-DIP (0.300", 7.62mm) Supplier Device Package: 8-PDIP Base Part Number: MAX7409	86 Order	1+: $2.8161 10+: $2.7014 50+: $2.6587
MAX265ACWI-ND	MAX265ACWI	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 28-SOIC (0.295", 7.50mm Width) Supplier Device Package: 28-SOIC Base Part Number: MAX265	1000 Order	1+: $0
UM25GC23-BTHR-N D	UM25GC23-BTHR	Mechatronics Fan Group	View more Series: UM25GC23 Part Status: Obsolete Voltage - Rated: 230VAC Size / Dimension: Round - 254mm Dia Width: 89.00mm Bearing Type: Ball Features: Permanent Split Capacitor Motor Termination: 2 Terminals Operating Temperature: -40 ~ 158F (-40 ~ 70C) Approvals: CE, cUL, TUV, UL	1000 Order	1+: $0
MAX261BEWG-ND	MAX261BEWG	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 57kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: MAX261	1000 Order	1+: $0
MAX262AEWG-ND	MAX262AEWG	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Active Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 24-SOIC (0.295", 7.50mm Width) Supplier Device Package: 24-SOIC Base Part Number: MAX262	1000 Order	1+: $0
MAX264AEWI-ND	MAX264AEWI	Maxim Integrated	View more Packaging: Tube Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant Part Status: Obsolete Moisture Sensitivity Level (MSL): 1 (Unlimited) Filter Type: Universal Switched Capacitor Frequency - Cutoff or Center: 140kHz Number of Filters: 2 Filter Order: 2nd Voltage - Supply: 5V Mounting Type: Surface Mount Package / Case: 28-SOIC (0.295", 7.50mm Width) Supplier Device Package: 28-SOIC Base Part Number: MAX264	1000 Order	1+: $0

< 244 245 246 247 248 >

Hot Searches: ceramic capacitor high and low ceramic capacitors high voltage ceramic capacitor low frequency ceramic capacitor high frequency ceramic capacitor multilayer ceramic capacitor chip ceramic capacitor multilayer chip ceramic capacitors wafer ceramic capacitor tubular ceramic capacitor rectangular ceramic capacitor through ceramic capacitor cut-to-foot ceramic capacitors solid ceramic vacuum capacitors multilayer ceramic capacitors ceramic chip capacitors ceramic disc capacitor ceramic ac capacitor low frequency ceramic dielectric ceramic capacitor ceramic capacitors with metal internal electrodes

Search Result:ceramic capacitor

Related Categories