[email protected] +44 20 8123 2220 (UK) +1 732 587 5005 (US) Contact Us | FAQ |
Advanced search

United States Glaucoma Treatment Drugs Market Report 2017

October 2017 | 100 pages | ID: UDF05F9E762PEN
QYResearch

US$ 3,800.00

E-mail Delivery (PDF)

Download PDF Leaflet

Accepted cards
Wire Transfer
Checkout Later
Need Help? Ask a Question
In this report, the United States Glaucoma Treatment Drugs market is valued at USD XX million in 2016 and is expected to reach USD XX million by the end of 2022, growing at a CAGR of XX% between 2016 and 2022.

Geographically, this report splits the United States market into seven regions:
  • The West
  • Southwest
  • The Middle Atlantic
  • New England
  • The South
  • The Midwest
  • with sales (volume), revenue (value), market share and growth rate of Glaucoma Treatment Drugs in these regions, from 2012 to 2022 (forecast).
United States Glaucoma Treatment Drugs market competition by top manufacturers/players, with Glaucoma Treatment Drugs sales volume, price, revenue (Million USD) and market share for each manufacturer/player; the top players including
  • Aerie Pharmaceuticals
  • Akorn Inc.
  • Alcon
  • Allergan plc
  • Bausch & Lomb Incorporated
  • Inotek Pharmaceuticals
  • Merck & Co. Inc
  • Pfizer Inc
  • Santen Pharmaceutical Co. Ltd
On the basis of product, this report displays the production, revenue, price, market share and growth rate of each type, primarily split into
  • Oral Type
  • Injection Type
On the basis on the end users/applications, this report focuses on the status and outlook for major applications/end users, sales volume, market share and growth rate of Glaucoma Treatment Drugs for each application, including
  • Hospital
  • Clinic
  • Home Care
If you have any special requirements, please let us know and we will offer you the report as you want.
United States Glaucoma Treatment Drugs Market Report 2017

1 GLAUCOMA TREATMENT DRUGS OVERVIEW

1.1 Product Overview and Scope of Glaucoma Treatment Drugs
1.2 Classification of Glaucoma Treatment Drugs by Product Category
  1.2.1 United States Glaucoma Treatment Drugs Market Size (Sales Volume) Comparison by Type (2012-2022)
  1.2.2 United States Glaucoma Treatment Drugs Market Size (Sales Volume) Market Share by Type (Product Category) in 2016
  1.2.3 Oral Type
  1.2.4 Injection Type
1.3 United States Glaucoma Treatment Drugs Market by Application/End Users
  1.3.1 United States Glaucoma Treatment Drugs Market Size (Consumption) and Market Share Comparison by Application (2012-2022)
  1.3.2 Hospital
  1.3.3 Clinic
  1.3.4 Home Care
1.4 United States Glaucoma Treatment Drugs Market by Region
  1.4.1 United States Glaucoma Treatment Drugs Market Size (Value) Comparison by Region (2012-2022)
  1.4.2 The West Glaucoma Treatment Drugs Status and Prospect (2012-2022)
  1.4.3 Southwest Glaucoma Treatment Drugs Status and Prospect (2012-2022)
  1.4.4 The Middle Atlantic Glaucoma Treatment Drugs Status and Prospect (2012-2022)
  1.4.5 New England Glaucoma Treatment Drugs Status and Prospect (2012-2022)
  1.4.6 The South Glaucoma Treatment Drugs Status and Prospect (2012-2022)
  1.4.7 The Midwest Glaucoma Treatment Drugs Status and Prospect (2012-2022)
1.5 United States Market Size (Value and Volume) of Glaucoma Treatment Drugs (2012-2022)
  1.5.1 United States Glaucoma Treatment Drugs Sales and Growth Rate (2012-2022)
  1.5.2 United States Glaucoma Treatment Drugs Revenue and Growth Rate (2012-2022)

2 UNITED STATES GLAUCOMA TREATMENT DRUGS MARKET COMPETITION BY PLAYERS/SUPPLIERS

2.1 United States Glaucoma Treatment Drugs Sales and Market Share of Key Players/Suppliers (2012-2017)
2.2 United States Glaucoma Treatment Drugs Revenue and Share by Players/Suppliers (2012-2017)
2.3 United States Glaucoma Treatment Drugs Average Price by Players/Suppliers (2012-2017)
2.4 United States Glaucoma Treatment Drugs Market Competitive Situation and Trends
  2.4.1 United States Glaucoma Treatment Drugs Market Concentration Rate
  2.4.2 United States Glaucoma Treatment Drugs Market Share of Top 3 and Top 5 Players/Suppliers
  2.4.3 Mergers & Acquisitions, Expansion in United States Market
2.5 United States Players/Suppliers Glaucoma Treatment Drugs Manufacturing Base Distribution, Sales Area, Product Type

3 UNITED STATES GLAUCOMA TREATMENT DRUGS SALES (VOLUME) AND REVENUE (VALUE) BY REGION (2012-2017)

3.1 United States Glaucoma Treatment Drugs Sales and Market Share by Region (2012-2017)
3.2 United States Glaucoma Treatment Drugs Revenue and Market Share by Region (2012-2017)
3.3 United States Glaucoma Treatment Drugs Price by Region (2012-2017)

4 UNITED STATES GLAUCOMA TREATMENT DRUGS SALES (VOLUME) AND REVENUE (VALUE) BY TYPE (PRODUCT CATEGORY) (2012-2017)

4.1 United States Glaucoma Treatment Drugs Sales and Market Share by Type (Product Category) (2012-2017)
4.2 United States Glaucoma Treatment Drugs Revenue and Market Share by Type (2012-2017)
4.3 United States Glaucoma Treatment Drugs Price by Type (2012-2017)
4.4 United States Glaucoma Treatment Drugs Sales Growth Rate by Type (2012-2017)

5 UNITED STATES GLAUCOMA TREATMENT DRUGS SALES (VOLUME) BY APPLICATION (2012-2017)

5.1 United States Glaucoma Treatment Drugs Sales and Market Share by Application (2012-2017)
5.2 United States Glaucoma Treatment Drugs Sales Growth Rate by Application (2012-2017)
5.3 Market Drivers and Opportunities

6 UNITED STATES GLAUCOMA TREATMENT DRUGS PLAYERS/SUPPLIERS PROFILES AND SALES DATA

6.1 Aerie Pharmaceuticals
  6.1.1 Company Basic Information, Manufacturing Base and Competitors
  6.1.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.1.2.1 Product A
    6.1.2.2 Product B
  6.1.3 Aerie Pharmaceuticals Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.1.4 Main Business/Business Overview
6.2 Akorn Inc.
  6.2.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.2.2.1 Product A
    6.2.2.2 Product B
  6.2.3 Akorn Inc. Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.2.4 Main Business/Business Overview
6.3 Alcon
  6.3.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.3.2.1 Product A
    6.3.2.2 Product B
  6.3.3 Alcon Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.3.4 Main Business/Business Overview
6.4 Allergan plc
  6.4.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.4.2.1 Product A
    6.4.2.2 Product B
  6.4.3 Allergan plc Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.4.4 Main Business/Business Overview
6.5 Bausch & Lomb Incorporated
  6.5.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.5.2.1 Product A
    6.5.2.2 Product B
  6.5.3 Bausch & Lomb Incorporated Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.5.4 Main Business/Business Overview
6.6 Inotek Pharmaceuticals
  6.6.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.6.2.1 Product A
    6.6.2.2 Product B
  6.6.3 Inotek Pharmaceuticals Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.6.4 Main Business/Business Overview
6.7 Merck & Co. Inc
  6.7.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.7.2.1 Product A
    6.7.2.2 Product B
  6.7.3 Merck & Co. Inc Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.7.4 Main Business/Business Overview
6.8 Pfizer Inc
  6.8.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.8.2.1 Product A
    6.8.2.2 Product B
  6.8.3 Pfizer Inc Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.8.4 Main Business/Business Overview
6.9 Santen Pharmaceutical Co. Ltd
  6.9.2 Glaucoma Treatment Drugs Product Category, Application and Specification
    6.9.2.1 Product A
    6.9.2.2 Product B
  6.9.3 Santen Pharmaceutical Co. Ltd Glaucoma Treatment Drugs Sales, Revenue, Price and Gross Margin (2012-2017)
  6.9.4 Main Business/Business Overview

7 GLAUCOMA TREATMENT DRUGS MANUFACTURING COST ANALYSIS

7.1 Glaucoma Treatment Drugs Key Raw Materials Analysis
  7.1.1 Key Raw Materials
  7.1.2 Price Trend of Key Raw Materials
  7.1.3 Key Suppliers of Raw Materials
  7.1.4 Market Concentration Rate of Raw Materials
7.2 Proportion of Manufacturing Cost Structure
  7.2.1 Raw Materials
  7.2.2 Labor Cost
  7.2.3 Manufacturing Expenses
7.3 Manufacturing Process Analysis of Glaucoma Treatment Drugs

8 INDUSTRIAL CHAIN, SOURCING STRATEGY AND DOWNSTREAM BUYERS

8.1 Glaucoma Treatment Drugs Industrial Chain Analysis
8.2 Upstream Raw Materials Sourcing
8.3 Raw Materials Sources of Glaucoma Treatment Drugs Major Manufacturers in 2016
8.4 Downstream Buyers

9 MARKETING STRATEGY ANALYSIS, DISTRIBUTORS/TRADERS

9.1 Marketing Channel
  9.1.1 Direct Marketing
  9.1.2 Indirect Marketing
  9.1.3 Marketing Channel Development Trend
9.2 Market Positioning
  9.2.1 Pricing Strategy
  9.2.2 Brand Strategy
  9.2.3 Target Client
9.3 Distributors/Traders List

10 MARKET EFFECT FACTORS ANALYSIS

10.1 Technology Progress/Risk
  10.1.1 Substitutes Threat
  10.1.2 Technology Progress in Related Industry
10.2 Consumer Needs/Customer Preference Change
10.3 Economic/Political Environmental Change

11 UNITED STATES GLAUCOMA TREATMENT DRUGS MARKET SIZE (VALUE AND VOLUME) FORECAST (2017-2022)

11.1 United States Glaucoma Treatment Drugs Sales Volume, Revenue Forecast (2017-2022)
11.2 United States Glaucoma Treatment Drugs Sales Volume Forecast by Type (2017-2022)
11.3 United States Glaucoma Treatment Drugs Sales Volume Forecast by Application (2017-2022)
11.4 United States Glaucoma Treatment Drugs Sales Volume Forecast by Region (2017-2022)

12 RESEARCH FINDINGS AND CONCLUSION

13 APPENDIX

13.1 Methodology/Research Approach
  13.1.1 Research Programs/Design
  13.1.2 Market Size Estimation
  13.1.3 Market Breakdown and Data Triangulation
13.2 Data Source
  13.2.1 Secondary Sources
  13.2.2 Primary Sources
13.3 Disclaimer


The report requires updating with new data and is sent in 2-3 business days after order is placed.


LIST OF TABLES AND FIGURES

Figure Product Picture of Glaucoma Treatment Drugs
Figure United States Glaucoma Treatment Drugs Market Size (K Units) by Type (2012-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume Market Share by Type (Product Category) in 2016
Figure Oral Type Product Picture
Figure Injection Type Product Picture
Figure United States Glaucoma Treatment Drugs Market Size (K Units) by Application (2012-2022)
Figure United States Sales Market Share of Glaucoma Treatment Drugs by Application in 2016
Figure Hospital Examples
Table Key Downstream Customer in Hospital
Figure Clinic Examples
Table Key Downstream Customer in Clinic
Figure Home Care Examples
Table Key Downstream Customer in Home Care
Figure United States Glaucoma Treatment Drugs Market Size (Million USD) by Region (2012-2022)
Figure The West Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure Southwest Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure The Middle Atlantic Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure New England Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure The South of US Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure The Midwest Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure United States Glaucoma Treatment Drugs Sales (K Units) and Growth Rate (2012-2022)
Figure United States Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate (2012-2022)
Figure United States Glaucoma Treatment Drugs Market Major Players Product Sales Volume (K Units) (2012-2017)
Table United States Glaucoma Treatment Drugs Sales (K Units) of Key Players/Suppliers (2012-2017)
Table United States Glaucoma Treatment Drugs Sales Share by Players/Suppliers (2012-2017)
Figure 2016 United States Glaucoma Treatment Drugs Sales Share by Players/Suppliers
Figure 2017 United States Glaucoma Treatment Drugs Sales Share by Players/Suppliers
Figure United States Glaucoma Treatment Drugs Market Major Players Product Revenue (Million USD) (2012-2017)
Table United States Glaucoma Treatment Drugs Revenue (Million USD) by Players/Suppliers (2012-2017)
Table United States Glaucoma Treatment Drugs Revenue Share by Players/Suppliers (2012-2017)
Figure 2016 United States Glaucoma Treatment Drugs Revenue Share by Players/Suppliers
Figure 2017 United States Glaucoma Treatment Drugs Revenue Share by Players/Suppliers
Table United States Market Glaucoma Treatment Drugs Average Price (USD/Unit) of Key Players/Suppliers (2012-2017)
Figure United States Market Glaucoma Treatment Drugs Average Price (USD/Unit) of Key Players/Suppliers in 2016
Figure United States Glaucoma Treatment Drugs Market Share of Top 3 Players/Suppliers
Figure United States Glaucoma Treatment Drugs Market Share of Top 5 Players/Suppliers
Table United States Players/Suppliers Glaucoma Treatment Drugs Manufacturing Base Distribution and Sales Area
Table United States Players/Suppliers Glaucoma Treatment Drugs Product Category
Table United States Glaucoma Treatment Drugs Sales (K Units) by Region (2012-2017)
Table United States Glaucoma Treatment Drugs Sales Share by Region (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Share by Region (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Market Share by Region in 2016
Table United States Glaucoma Treatment Drugs Revenue (Million USD) and Market Share by Region (2012-2017)
Table United States Glaucoma Treatment Drugs Revenue Share by Region (2012-2017)
Figure United States Glaucoma Treatment Drugs Revenue Market Share by Region (2012-2017)
Figure United States Glaucoma Treatment Drugs Revenue Market Share by Region in 2016
Table United States Glaucoma Treatment Drugs Price (USD/Unit) by Region (2012-2017)
Table United States Glaucoma Treatment Drugs Sales (K Units) by Type (2012-2017)
Table United States Glaucoma Treatment Drugs Sales Share by Type (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Share by Type (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Market Share by Type in 2016
Table United States Glaucoma Treatment Drugs Revenue (Million USD) and Market Share by Type (2012-2017)
Table United States Glaucoma Treatment Drugs Revenue Share by Type (2012-2017)
Figure Revenue Market Share of Glaucoma Treatment Drugs by Type (2012-2017)
Figure Revenue Market Share of Glaucoma Treatment Drugs by Type in 2016
Table United States Glaucoma Treatment Drugs Price (USD/Unit) by Types (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Growth Rate by Type (2012-2017)
Table United States Glaucoma Treatment Drugs Sales (K Units) by Application (2012-2017)
Table United States Glaucoma Treatment Drugs Sales Market Share by Application (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Market Share by Application (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Market Share by Application in 2016
Table United States Glaucoma Treatment Drugs Sales Growth Rate by Application (2012-2017)
Figure United States Glaucoma Treatment Drugs Sales Growth Rate by Application (2012-2017)
Table Aerie Pharmaceuticals Basic Information List
Table Aerie Pharmaceuticals Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Aerie Pharmaceuticals Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Aerie Pharmaceuticals Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Aerie Pharmaceuticals Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Akorn Inc. Basic Information List
Table Akorn Inc. Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Akorn Inc. Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Akorn Inc. Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Akorn Inc. Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Alcon Basic Information List
Table Alcon Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Alcon Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Alcon Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Alcon Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Allergan plc Basic Information List
Table Allergan plc Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Allergan plc Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Allergan plc Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Allergan plc Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Bausch & Lomb Incorporated Basic Information List
Table Bausch & Lomb Incorporated Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Bausch & Lomb Incorporated Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Bausch & Lomb Incorporated Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Bausch & Lomb Incorporated Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Inotek Pharmaceuticals Basic Information List
Table Inotek Pharmaceuticals Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Inotek Pharmaceuticals Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Inotek Pharmaceuticals Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Inotek Pharmaceuticals Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Merck & Co. Inc Basic Information List
Table Merck & Co. Inc Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Merck & Co. Inc Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Merck & Co. Inc Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Merck & Co. Inc Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Pfizer Inc Basic Information List
Table Pfizer Inc Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Pfizer Inc Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Pfizer Inc Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Pfizer Inc Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Santen Pharmaceutical Co. Ltd Basic Information List
Table Santen Pharmaceutical Co. Ltd Glaucoma Treatment Drugs Sales (K Units), Revenue (Million USD), Price (USD/Unit) and Gross Margin (2012-2017)
Figure Santen Pharmaceutical Co. Ltd Glaucoma Treatment Drugs Sales Growth Rate (2012-2017)
Figure Santen Pharmaceutical Co. Ltd Glaucoma Treatment Drugs Sales Market Share in United States (2012-2017)
Figure Santen Pharmaceutical Co. Ltd Glaucoma Treatment Drugs Revenue Market Share in United States (2012-2017)
Table Production Base and Market Concentration Rate of Raw Material
Figure Price Trend of Key Raw Materials
Table Key Suppliers of Raw Materials
Figure Manufacturing Cost Structure of Glaucoma Treatment Drugs
Figure Manufacturing Process Analysis of Glaucoma Treatment Drugs
Figure Glaucoma Treatment Drugs Industrial Chain Analysis
Table Raw Materials Sources of Glaucoma Treatment Drugs Major Players/Suppliers in 2016
Table Major Buyers of Glaucoma Treatment Drugs
Table Distributors/Traders List
Figure United States Glaucoma Treatment Drugs Sales Volume (K Units) and Growth Rate Forecast (2017-2022)
Figure United States Glaucoma Treatment Drugs Revenue (Million USD) and Growth Rate Forecast (2017-2022)
Figure United States Glaucoma Treatment Drugs Price (USD/Unit) Trend Forecast (2017-2022)
Table United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Type (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Type (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Type in 2022
Table United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Application (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Application (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Application in 2022
Table United States Glaucoma Treatment Drugs Sales Volume (K Units) Forecast by Region (2017-2022)
Table United States Glaucoma Treatment Drugs Sales Volume Share Forecast by Region (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume Share Forecast by Region (2017-2022)
Figure United States Glaucoma Treatment Drugs Sales Volume Share Forecast by Region in 2022
Table Research Programs/Design for This Report
Figure Bottom-up and Top-down Approaches for This Report
Figure Data Triangulation
Table Key Data Information from Secondary Sources
Table Key Data Information from Primary Sources

More Publications

Need Help?

Ask a Question

Market Reports

All Categories